ltp: sigprocmask fix

[zzby0]

Summary

problem: SIGKILL and SIGSTOP should not be added in signal mask;
solution: check before adding signal to signal mask

Impact

ostest: sigprocmask (under /apps/testing/ostest) will fail, so I change ostest: sigprocmask.c together

Testing

[zzby0]

ostest change commit is here: apache/nuttx-apps#1857

[masayuki2009]

@zzby0 @xiaoxiang781216

I noticed that ostest failed with spresense:smp since the apache/nuttx-apps#1857 is not merged.

receiver_thread: returning nerrors=0
timedmqueue_test: Test complete

End of test memory usage:
VARIABLE  BEFORE   AFT[CPU0] _assert: Current Version: NuttX  12.0.0 55a727b1ce Aug  1 2023 15:05:49 arm
[CPU0] _assert: Assertion failed : at file: :0 task(CPU0): ostest 0xd00d509
[CPU0] up_dump_register: R0: 2d029030 R1: 00000000 R2: 00000000  R3: 2d028b90
[CPU0] up_dump_register: R4: 2d029030 R5: 2d02ec18 R6: 0d020058  FP: 00000000
[CPU0] up_dump_register: R8: 00000000 SB: 00000000 SL: 00000000 R11: 00000000
[CPU0] up_dump_register: IP: 00000001 SP: 2d0335e0 LR: 0d003e0d  PC: 0d003e0d
[CPU0] up_dump_register: xPSR: 60000000 BASEPRI: 000000e0 CONTROL: 00000004
[CPU0] up_dump_register: EXC_RETURN: ffffffff
[CPU0] dump_stack: User Stack:
[CPU0] dump_stack:   base: 0x2d031778
[CPU0] dump_stack:   size: 00008128
[CPU0] dump_stack:     sp: 0x2d0335e0
[CPU0] stack_dump: 0x2d0335e0: 0d026533 00000000 00000000 2d02eca0 0d00d509 0d004e3d 00000000 7474754e
[CPU0] stack_dump: 0x2d033600: 2d020058 0d004e79 00000000 2d02ec18 000000e0 2d02ee87 00000001 0d003b85
[CPU0] stack_dump: 0x2d033620: 2d0272c8 000000e0 0000002f 0d004d61 2e323100 00302e30 0000002f 0d004d7d
[CPU0] stack_dump: 0x2d033640: 00000000 35354e3d 37323761 65633162 67754120 20312020 33323032 3a353120
[CPU0] stack_dump: 0x2d033660: 343a3530 2d030039 0d02006c 0d003b85 2d02ee30 000000e0 6d726158 0d004d00
[CPU0] stack_dump: 0x2d033680: 2d02ee30 2d02ee2c 0d020058 0d004d7d 2d02ee30 00000005 00000009 0d020058
[CPU0] stack_dump: 0x2d0336a0: 2d031740 0d02006c 2d03176e 00000000 00000000 0d008197 00000000 0d00eaf5
[CPU0] stack_dump: 0x2d0336c0: 00000000 00000000 000000aa 00000000 000002aa 00000000 00000005 00000000
[CPU0] stack_dump: 0x2d0336e0: 2d02984c 2d031740 0d01f577 0d00d6f5 00155470 00000003 00000066 0014c8c0
[CPU0] stack_dump: 0x2d033700: 00006da8 0014e6c8 00000000 0d00d509 00000005 2d031740 00000000 00000000
ER
======== ======== ========
arena      155470   155470
ordblks         4        5
mxordblk   14a8b8   1488b0
uordblks     8548     a640
fordblks   14cf28   14ae30

user_main: sigprocmask test
sigprocmask_test: ERROR unexpected sigprocmask
ostest_main: Exiting with status 256

[xiaoxiang781216]

Yes, ostest need update too, let me merge it.