LTP: openposix test suite - FAIL: SIGUSR1 is member of new thread pendingset.

conformance/interfaces/pthread_create/pthread_create_8-1: execution: FAILED: Output: 
FAIL: SIGUSR1 is member of new thread pendingset.

conformance/interfaces/pthread_kill/pthread_kill_6-1: execution: FAILED: Output: 
Test Fail

conformance/interfaces/pthread_sigmask/pthread_sigmask_4-1: execution: FAILED: Output: 
FAIL: Signal was not blocked
Test FAILED
conformance/interfaces/pthread_sigmask/pthread_sigmask_5-1: execution: FAILED: Output: 
FAIL: Signal was not blocked
Test FAILED
conformance/interfaces/pthread_sigmask/pthread_sigmask_6-1: execution: FAILED: Output: 
FAIL: Hanlder was called for even though signal should have been in the signal mask
Test FAILED

https://datawarehouse.cki-project.org/kcidb/tests/1565966

https://datawarehouse.cki-project.org/issue/653