no patch to .brik in latest snapshot diff!

[Joe Buck]

egcs-971225-980115.diff.gz does not contain a patch to the .brik file.

Please, let's try to do a better job of having good diffs; not everyone
has a high-bandwidth connection and it is important that people can
reliably use and verify diffs to get the latest snapshot.

We've persistently had problems with diffs.  It seems that there should
be a better way to safely automate the process, e.g. a script that takes
two xxx.tar.gz files and produces a diff that is guaranteed to turn the
first one into the second one.  If this were done once it would never
go wrong again.