#29 incorrect use perror to report error while test pthread func

[Ling]

conformance/interfaces/pthread_attr_setinheritsched/2-
1.c reports
errors incorrectly. pthread functions generally return the
error code
rather than setting errno. The use of perror to report
errors is
hence incorrect:

/* Initialize attr */
rc = pthread_attr_init(&attr);
if( rc != 0) {
perror(ERROR_PREFIX "pthread_attr_init");
exit(PTS_UNRESOLVED);
}

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user_id=1150012

Like conformance/interfaces/pthread_attr_setinheritsched/2-
1.c, this
test incorrectly uses perror to report errors. If
pthread_attr_setstack, the error code is the return value, not
errno.