Log Message:
Use /proc/../maps to get shared library information on NetBSD.
use sysctl kern.proc to get the executable's name on NetBSD.
Add  --enable-stacktrace-via-backtrace to configure
tested on x86_64 and earmv7hf; stacktrace doesn't work on earmv7hf (this
seems to be a problem in our _Unwind_Backtrace implementation).
Bump PKGREVISION