Issues on ec2

[paulfloyd]

FreeBSD 14 ZFS on a c7g.medium instance

== 722 tests, 4 stderr failures, 0 stdout failures, 1 stderrB failure, 2 stdoutB failures, 0 post failures ==
gdbserver_tests/mcinvokeWS               (stdoutB)
gdbserver_tests/mcinvokeWS               (stderrB)
gdbserver_tests/nlvgdbsigqueue           (stderr)
gdbserver_tests/nlvgdbsigqueue           (stdoutB)
memcheck/tests/descr_belowsp             (stderr)
callgrind/tests/threads-use              (stderr)
drd/tests/pth_cancel_locked              (stderr)

The gdb tests just look like flaky timing issues.

descr_belowsp is a known issue

the callgrind test - strange

pth_cancel_locked is hanging, again it's probably a flaky test