Compile warnings for SIGALIGN when FLEN is 64 in arch_test.h

[ssecatch-w]

New arch_test.h, pulled on Jan 3rd, now doubly defines SIGALIGN when FLEN is 64. This generates very verbose compile warnings.
Please remove it from the == 64 clause, since the FLEN > XLEN check fully resolves the issue.

#if FLEN==64
#define FLREG fld
#define FSREG fsd
#define FREGWIDTH 8
#define SIGALIGN 8
#else
#if FLEN==32
#define FLREG flw
#define FSREG fsw
#define FREGWIDTH 4

#endif
#endif

#if FLEN>XLEN
#define SIGALIGN FREGWIDTH
#else
#define SIGALIGN REGWIDTH
#endif

[neelgala]

This should be fixed by #277

[ssecatch-w]

Looks like this doubling has been cleaned up in the latest repo. Thanks!

[allenjbaum]

is fixed, so closing