[contrib] add new reghunt scripts in reghunt/bin

[Janis Johnson]

I've finally added regression hunt scripts for revision-based hunts
to contrib/reghunt.   Scripts reg-hunt, reg-test, and reg-newmid are
not specific to GCC and could be used for any project.

Checked into mainline.  The patch is big and just a bunch of new files
so it's attached as a bzipped tarball.

2009-02-17  Janis Johnson  <janis187@us.ibm.com>

	* bin: New directory.
	* bin/reg-hunt: New.
	* bin/gcc-svn-update: New.
	* bin/gcc-svn-update-fix: New.
	* bin/gcc-build-simple: New.
	* bin/gcc-build-full: New.
	* bin/gcc-cleanup: New.
	* bin/reg-test: New.
	* bin/reg-newmid: New.
	* bin/gcc-test-ice-on-valid-code: New.
	* bin/gcc-test-ice-on-invalid-code: New.
	* bin/gcc-test-compiler-hangs: New.
	* bin/gcc-test-missing-warning: New.
	* bin/gcc-test-bogus-warning: New.
	* bin/gcc-test-segfault-on-valid-code: New.
	* bin/gcc-test-rejects-valid: New.
	* bin/gcc-test-accepts-invalid: New.
	* bin/gcc-test-wrong-code: New.
	* bin/gcc-svn-patchlist: New.
	* bin/gcc-svn-checkfail: New.
	* bin/gcc-svn-recordfail: New.
	* bin/gcc-svn-report: New.
	* bin/gcc-svn-ids: New.

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