LLDB/NetBSD report May/2018: Coverage of signal routines in the kernel in the context of ptrace(2)

The number of ATF ptrace(2) tests cases has been significantly
incremented, however there is still a substantial amount of work to be
done and a number of serious bugs to be resolved.

With fixes and addition of new test cases, as of today we are passing
1,206 (last month: 961) ptrace(2) tests and skipping 1 (out of 1,256
total; last month: 1,018 total). No counted here tests that appeared
outside the ptrace(2) context.

Plan for the next milestone:

Cover with regression tests remaining elementary scenarios of handling
crash signals. Fix known bugs in the NetBSD kernel.

Follow up the process with the remaining fork(2) and vfork(2) scenarios.

This work was sponsored by The NetBSD Foundation.