[PATCH] Fix "clear" in console window

[Keith Seitz]

I have checked in the following (hack) for making "clear" work in the 
console window. This fixes many failures with the srcwin testsuite.

Keith

	* generic/gdbtk-cmds.c (gdb_get_breakpoint_info): If unable
	to find the requested breakpoint for lookup, check if
	it is about to be deleted and return information about
	that breakpoint.
	(gdb_get_tracepoint_info): Ditto for tracepoints.
	* generic/gdbtk-hooks.c (gdbtk_deleted_bp): New global.
	(gdbtk_delete_breakpoint): Remember the deleted breakpoint
	for gdb_get_breakpoint_info, in case it is called during
	the event notification.
	(gdbtk_delete_tracepoints): Ditto for tracepoints.

Patches:
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/gdbtk/ChangeLog.diff?cvsroot=src&r1=1.67&r2=1.68
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/gdbtk/generic/gdbtk-cmds.c.diff?cvsroot=src&r1=1.31&r2=1.32
http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/gdb/gdbtk/generic/gdbtk-hooks.c.diff?cvsroot=src&r1=1.11&r2=1.12