* config/mips-gdb.exp (gdb_load): Increase timeout to 2400.

	* config/mips-gdb.exp (gdb_load): Increase timeout to 2400.
	Rework board rebooting slightly.
	(gdb_exit): Don't exit from the remote shell; there isn't one.
	* gdb.stabs/weird.exp: If a program is being debugged already,
	kill it.
	* gdb.t04/setvar.exp: Stop and restart gdb.
	* gdb.t05/expr.exp: Likewise.
	* gdb.t07/watchpoint.exp: If target is mips-idt-*, stop and
	restart gdb and reload the program.
	* gdb.t08/opaque.exp: Likewise.
	* gdb.t12/scope.exp: Likewise.
	* gdb.t13/bitfields.exp: Likewise.
	* gdb.t15/funcargs.exp: Likewise.
	* gdb.t20/classes.exp: Likewise.
	* gdb.t03/ptype.exp: Increase timeout.
	* gdb.t16/printcmds.exp (test_print_string_constants,
	test_print_array_constants): Likewise.
	* gdb.t17/callfuncs.exp (do_function_calls): Likewise.
	* gdb.t20/classes.exp (do_tests): Likewise.
	* gdb.t22/virtfunc.exp (test_virtual_calls): Likewise.