lib/55087: lib/libc/sys/t_ptrace_waitid:syscall_signal_on_sce test case fails

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         55087
>Category:       lib
>Synopsis:       lib/libc/sys/t_ptrace_waitid:syscall_signal_on_sce test case fails
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 19 16:25:00 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date > 2020.03.01 or so
>Organization:

>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

The lib/libc/sys/t_ptrace_waitid:syscall_signal_on_sce test case fails
with a timeout, apparently ever since the test was added during a
period of build braekage in early March.  For example:

  http://www.gson.org/netbsd/bugs/build/amd64-baremetal/2020/2020.03.02.20.04.42/test.html#lib_libc_sys_t_ptrace_waitid_syscall_signal_on_sce
  http://www.gson.org/netbsd/bugs/build/amd64-baremetal/2020/2020.03.18.19.34.15/test.html#lib_libc_sys_t_ptrace_waitid_syscall_signal_on_sce
  http://releng.netbsd.org/b5reports/i386/2020/2020.03.18.01.40.56/test.html#lib_libc_sys_t_ptrace_waitid_syscall_signal_on_sce

The syscall_signal_on_sce test cases in other test programs get
classified as expcected failures, but this one does not.

>How-To-Repeat:

Run the ATF tests.

>Fix: