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.
(cherry picked from commit f1837377d2)
Change-Id: I973d999c31c9ab89b5a7b709beff6486b93408f2
C11 defines the expected value to atomic_compare_exchange_* as being non-atomic
types. Using an atomic type is a syntax error in clang.
http://en.cppreference.com/w/c/atomic/atomic_compare_exchange
Change-Id: I74de1061fa1fc50d835451792d902000f368200e