libodb search path does not include lib64

[unallocatedanonymous]

In deps/mk/odb.mk it attempts to detect whether mysql or sqlite should be used, but it only searches /lib, not /lib64. On Fedora, using an AMD64 CPU, the files are only in /lib64.

I hacked around this by just hardcoding DB = sqlite, but non-programmers might not be able to dig into the code like that, so it'd probably be best to update the code.