timerfd_settime02 from ubuntu_ltp_syscalls failed on B s390x

This issue was only found on s390x nodes, the test failed with:
    tst_taint.c:88: BROK: Kernel is already tainted: 12800

Looks like this was caused by something else in this test suite.

And this is a new test case, we don't have it for the last cycle (4.15.0-91.92), thus this is not a regression.

Test output on 4.15.0-92 s390x:
 startup='Wed Mar 18 00:09:03 2020'
 tst_test.c:1229: INFO: Timeout per run is 0h 05m 00s
 tst_taint.c:88: BROK: Kernel is already tainted: 12800

 Summary:
 passed 0
 failed 0
 skipped 0
 warnings 0
 tag=timerfd_settime02 stime=1584490143 dur=0 exit=exited stat=2 core=no cu=0 cs=0