RFA: add testsuite function for answering internal error questions

[Jim Blandy]

I've reverted the change from the 5.3 branch, too.  Fernando needs to
approve them for both the trunk and the branch.

Jim Blandy <jimb@redhat.com> writes:

> Actually, I've reverted this, and the other change to
> gdb.base/step-line.exp.  Daniel J. pointed out that they've been
> committed to the 5.3 branch, but weren't present on the trunk; in a
> sleepy haze, it seemed to me that I should just check them in.
> 
> Fernando, any comment on these?  The companion patch is:
> "RFA: test macro expansion in presence of #line directives"
> 
> Jim Blandy <jimb@redhat.com> writes:
> 
> > I've committed this.
> > 
> > Jim Blandy <jimb@redhat.com> writes:
> > 
> > > [re-posting: bad changelog entry.]
> > > 
> > > 2002-11-06  Jim Blandy  <jimb@redhat.com>
> > > 
> > > 	* lib/gdb.exp (gdb_internal_error_regexp): New variable.
> > > 	(gdb_internal_error_resync): New procedure.
> > >         (gdb_test): If the command results in an internal error,
> > >         answer GDB's questions until we get back to a prompt.