m32r-linux add-on ports of glibc

[Roland McGrath]

If the comment is correct that dynamic linking doesn't work, then don't
provide bogus code.  You can just omit the code and require that people
build with --disable-shared.

You really don't want to be possibly setting errno in all those
linuxthreads internals functions.  You should use INTERNAL_SYSCALL instead
of INLINE_SYSCALL in those places.

The sysdeps/unix/sysv/linux/m32r/Versions file doesn't make any sense to me.
There is no point starting a GLIBC_2.2 version there when you have the
minimum set to GLIBC_2.3 by shlib-versions.  There is no reason you need to
replicate any existing functions there.  If you really must add `cachectl'
and the like, they should be in a GLIBC_2.3 or later set.