[PATCH] Add OUTPUT_FORMAT () into libc.so version script

[Roland McGrath]

I reimplemented this using a file that caches the result, and creating it
with just one run with -v -Wl,--verbose and one pass of sedly goodness.

I tested my sed script on hand-hacked output approximating what relevant
platforms might produce, but only tried an actual real run of the new rules
on i686-linux-gnu.  Please make sure the installed libc.so is coming out
properly in any other configurations you build, and let me know if I blew it.


Thanks,
Roland