Revert "[mips] Fix sem_init_glibc test for MIPS."

The commit did not fix the failing test and instead exposed an inconsistency
between lsan and (t|m|a)san. I'm reverting the patch as it causes more failures
and the original patch had a '||' instead of '&&', which meant that an N32 build
of test would have be incorrect w.r.t. __HAVE_64B_ATOMICS for glibc.

This reverts commit r313248.

llvm-svn: 313291