* gdb.t00/default.exp, gdb.t01/run.exp, gdb.t02/whatis.exp,

	* gdb.t00/default.exp, gdb.t01/run.exp, gdb.t02/whatis.exp,
	gdb.t03/ptype.exp, gdb.t06/break.exp, gdb.t12/scope.exp: Added
	expected failures for mips-idt-* and mips-sgi-*.
	* gdb.t00/default.exp (attach): Kill process if requested.
	* gdb.t00/help.exp (help target core, help target): Accept a gdb
	that does not read core files.
	* gdb.t01/run.exp: Removed checks for exit status code.
	* gdb.t03/in-gdbme.c: Make explicit call to malloc to ensure that
	it is linked in.
	* gdb.t03/ptype.exp: Increase timeout when calling malloc.
	* gdb.t04/setvar.exp, gdb.t05/expr.exp: Use runto function where
	appropriate, rather than doing it by hand.
	* gdb.t07/watchpoint.exp: If mips-idt-*, reload file after first
	execution.
	* gdb.t10/crossload.exp: Kill existing program if needed.
	* gdb.t15/funcargs.exp: Use delete_breakpoints function where
	appropriate, rather than doing it by hand.  Always increase
	timeout for this test, not just for VxWorks.