meson: switch function tests from compilation to linking

Some tests for glibc functions cause compilation to emit warnings but
still succeed even if the function is not there.  Therefore, change
from cc.compiles to cc.links.

Reported-by: Richard Zak <richard.j.zak@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed