* progmodes/gdb-mi.el (gdb-init-1): Set correct mode name for

* progmodes/gdb-mi.el (gdb-init-1): Set correct mode name for
disassembly buffer.
(gdb-breakpoints-list-handler-custom): Replacement for
gdb-break-list-handler. Using real parser instead of regexps now.
(gdb-place-breakpoints): Replacement for gdb-break-list-custom.
Use gdb-breakpoints-list instead of parsing breakpoints buffer to
place breakpoints.
(def-gdb-memory-unit): A new macro to define gdb-memory-unit-..
functions.
(gdb-disassembly-handler-custom): Show overlay arrow.
(gdb-disassembly-place-breakpoints): Show breakpoints in
disassembly buffer.
(gdb-toggle-breakpoint, gdb-delete-breakpoint)
(gdb-goto-breakpoint): Using gdb-breakpoint text properties
instead of parsing breakpoints buffer.
Fixed old menu references in gud-menu-map.