Open POSIX Test Suite

Hi,

conformance/interface/pthread_mutexattr_gettype/speculative/3-1.c tests
that pthread_mutexattr_gettype() on a zeroed pthread_mutexattr_t returns
EINVAL. But a zeroed pthread_mutexattr_t _may_ be valid: posix says that
pthread_mutexattr_gettype() _may_ return EINVAL if the pthread_mutexattr_t
is invalid, but not that it _shall_ return EINVAL in such case (since being
invalid is not defined).

Just like conformance/interface/pthread_mutex_destroy/speculative/4-2.c,
conformance/interface/pthread_mutexattr_gettype/speculative/3-1.c should
also PASS even when EINVAL is not returned.