[patch] More DWARF-4 support

[DJ Delorie]

> I've CC'ed DJ to ask whether it happens automatically--I can never
> remember whether the automatic syncer covers files in include.

It's semi-automatic from gcc to src, and includes include, intl,
libdecnumber, and libiberty.  The include/* rule is: if gcc has a
copy, that's the master copy.

The cron job does everything but the final commit, which is wrapped in
a script it generates.  I just run the script when it tells me to.