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. :-)
8cbd903e9c