libc: Migrate from COMPAT_32BIT to generic COMPAT_LIBCOMPAT

[jrtc27]

Summary

In this instance we don't get any benefit from its genericity, but the
two are equivalent here and this will allow the old COMPAT_32BIT to be
removed.

Note that the fact we even look at COMPAT_32BIT here in the first place
is questionable given you don't really want amd64 lib32 libc and true
i386 libc to differ in exported symbols, so add an XXX to that effect.

[imp]

Good question btw

[kib]

lib/libc/i386/sys/Makefile.inc

5

I suggest removing the .if at all, unconditionally adding the objects (assuming it builds).

[jrtc27]

lib/libc/i386/sys/Makefile.inc

5

Turns out they do in fact build, I wonder what decade that became true in. Will drop this patch in favour of that.

[jrtc27]

Obsoleted by D40937

[kib]

lib/libc/i386/sys/Makefile.inc

5

I suspect not that much ancient history. It probably come with the unification of x86 headers.