infrun.c:handle_inferior_event: Move process_event_stop_test goto label.

infrun.c:handle_inferior_event: Move process_event_stop_test goto label.

We only ever call "goto process_event_stop_test;" right after checking
that ecs->random_signal is clear.  The code at the
process_event_stop_test label looks like:

  /* For the program's own signals, act according to
     the signal handling tables.  */

  if (ecs->random_signal)
    {
     ... random signal handling ...
     return;
    }
  else
    {
     ... the stop tests that actually matter for the goto callers.
    }

So this moves the label into the else branch.  It'll make converting
process_event_stop_test into a function a bit clearer.

gdb/
2013-10-28  Pedro Alves  <palves@redhat.com>

	* infrun.c (handle_inferior_event): Move process_event_stop_test
	goto label to the else branch of the ecs->random_signal check,
	along with FRAME and GDBARCH re-fetching.