(gud-find-file): Set up GDB tool bar.

(gud-find-file): Set up GDB tool bar.
(gud-menu-map): New commands: run, goto.
Enable some commands for gdba.
(gud-query-cmdline): Pass default directory to gdba.
(gdb): Defune gud-goto and gud-run.
(gud-gdb-complete-command): Maybe use gdba-complete-filter.
(gud-mode): Set up local tool bar.
(gud-display-line): For gdba, call gdb-display-source-buffer.
(gud-basic-call): For gdba, maybe delete the current prompt.
(gud-tool-bar-map): New variable.
(gud-read-address): Correction.