[commit] Last major piece of fork tracing - vfork/exec

[Michael Elizabeth Chastain]

I hate to cause trouble here.  We're all on edge with the release
coming up (and this is also end-of-quarter for the red hat people).
But I have to speak up.

The release is already being held up for the gdb.c++ -> gdb.cp
renaming.  The one-week comment period for that change ends this
afternoon.  Then I can commit this change to gdb HEAD.  Then it
needs a shakedown period in gdb HEAD.  Then I can commit the
change to gdb gdb_6_0-branch, and it will need a shakedown period
there as well.

Andrew, I'm frankly amazed that you decided this feature was
release critical, but that's okay.  My role is to get it into
the branch expeditiously.

Also I'm not saying "as long as we have one dependency it's okay
to have two".  Dependencies are expensive, mmmkay.  I'm just
saying that gdb 6.0 already has this gdb.cp dependency, so it's
not all Daniel's fault that the release is slipping.

Michael C