[MIPS] Fix atomic_is_lock_free test for mips32.
On 32-bit MIPS, 64-bit atomic ops are achieved through locks.
So allow the test to fail for atomic_intmax_t on 32-bit MIPS.

Change-Id: I78e7807e50f899a0fea0d5b388d9ebb53228aaa0
1 file changed