Please update outdated config.{guess,sub} in the repository

[xctan]

Current releases contain config.guess and config.sub that dates from 2003, which does not recognize many new architectures like RISC-V or LoongArch. #400 has a similar issue.

checking build system type... ./config.guess: unable to guess system type                                                                                                          
                                                                                                                                                                                   
This script, last modified 2003-02-22, has failed to recognize                                                                                                                     
the operating system you are using. It is advised that you                                                                                                                         
download the most up to date version of the config scripts from                                                                                                                    
                                                                                                                                                                                   
    ftp://ftp.gnu.org/pub/gnu/config/                                                                                                                                              
                                                                                                                                                                                   
If the version you run (./config.guess) is already up to date, please                                                                                                              
send the following data and any information you think might be                                                                                                                     
pertinent to <[email protected]> in order to provide the needed                                                                                                               
information to handle your system.                                                                                                                                                 
                                                                                                                                                                                   
config.guess timestamp = 2003-02-22                                                                                                                                                
                                                                                                                                                                                   
uname -m = riscv64                                                                                                                                                                 
uname -r = 6.5.9-arch2-1                                                                                                                                                           
uname -s = Linux                                                                                                                                                                   
uname -v = #1 SMP PREEMPT_DYNAMIC Thu, 26 Oct 2023 00:52:20 +0000                                                                                                                  
                                                                                                                                                                                   
/usr/bin/uname -p = unknown                                                                                                                                                        
/bin/uname -X     =                                                                                                                                                                
                                                                                                                                                                                   
hostinfo               =                                                                                                                                                           
/bin/universe          =                                                                                                                                                           
/usr/bin/arch -k       =                                                                                                                                                           
/bin/arch              =                                                                                                                                                           
/usr/bin/oslevel       =                                                                                                                                                           
/usr/convex/getsysinfo =                                                                                                                                                           
                                                                                                                                                                                   
UNAME_MACHINE = riscv64                                                                                                                                                            
UNAME_RELEASE = 6.5.9-arch2-1                                                                                                                                                      
UNAME_SYSTEM  = Linux                                                                                                                                                              
UNAME_VERSION = #1 SMP PREEMPT_DYNAMIC Thu, 26 Oct 2023 00:52:20 +0000                                                                                                             
configure: error: cannot guess build type; you must specify one