Log Message:
lang/gcc-aux: Save work on OpenBSD - work suspended

gcc-aux builds on OpenBSD, but the default posix thread handling for Ada
tasking no longer works.  All tasks get stuck in a "Thread Sleep" sleep
state.  The gcc4.8.2-based egcc in OpenBSD ports supports Ada and passes
all tests.  There is no difference in the configuration between that and
gcc-aux.  To fix, it probably requires tasking support unique to OpenBSD
and that's out of scope for me at the moment, especially considering the
lack of a suitable development machine.

As such, I'm suspending my work on OpenBSD.  This commit captures some
minor bug fixes.  The addition of "--enable-checking" configuration switch
should be the default so there's no need bump gcc-aux again.