* lib/gas-defs.exp (run_dump_test): New routine for running the

	* lib/gas-defs.exp (run_dump_test): New routine for running the
	assembler, running objdump or nm (not fully supported) on the
	resulting object file, and comparing the results against a file of
	regular expressions in the test suite, all in one command.
	(fail_phase, slurp_options): New auxiliary routines.
	(regexp_diff): Always return a value.  Fix bugs in actually doing
	the regexp test.

Should make it even easier to write gas test cases, giving Ian even less
excuse for not doing so. :-)