[BUG] one glitch in rt_sigaction

[StanPlatinum]

Describe the bug

During the investigation of rt_sigaction, we found that since the last parameter sigsetsize should be ineffective, setting sigsetsize to -1 ought to result in the errno returned being: EINVAL. Nevertheless, in Occlum, the test succeeded and returned Success.

To reproduce

As mentioned above.

Environment

• HW: [SGX1, SGX2]
• OS: [Ubuntu20.04]
• Occlum version: [0.30.0]

Additional context

Add any other context about the problem here.

Possible solution/Implementation

Not obligatory, but suggest a fix/reason for the bug.

[ClawSeven]

Thanks, problem fixed in PR #1485.