[PATCH] use AS_HELP_STRING throughout gcc/configure.ac

[Andreas Schwab]

"Ralf Wildenhues" <Ralf.Wildenhues@gmx.de> writes:

> Yes, if you visually compared the diff of configure and of './configure
> --help' before and after the change, to only contain intended changes.

Yes, I did.  The help texts are now nicely aligned and folded, except
for a few which come from outside (more to follow).

Thanks, Andreas.

-- 
Andreas Schwab, schwab@redhat.com
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