[RFC] src-release.sh: Convert src-release to a shell script

[Hans-Peter Nilsson]

> From: Will Newton <will.newton@linaro.org>
> Date: Wed, 27 Aug 2014 14:52:40 +0200

> I made that change and pushed. Let me know if anyone finds any
> functionality missing.

I wished you had not also pushed the deletion of the old
src-release Makefile at the same time; your posted ChangeLog
and the discussion didn't indicate that...  (heads-up to others)

Anyway, I'ved moved over my (sim, binutils) autotesters to
src-release.sh and so far so good.

(Incidentally, they had no problems with the tarballs being
previously misnamed, e.g. "binutils-@VERSION@.tar.bz2". :-)

brgds, H-P