New 2.95.3 packages

[Matthias Klose <doko@cs.tu-berlin.de>]

Ok, some dependency changes in the gcc-2.95 package and a new source
package gcc-defaults. Together this should make a smooth upgrade from
2.95.2. For arm, alpha, m68k, i386, powerpc I got feedback that at
least apt-get is still working with the new libstdc++. If there are no
major bugs in the dependencies I plan to upload these packages on
Sunday or Monday. At least that's our unstable dist and I will try
hard to beat xfree86 and kde on the number of uploads to unstable ;-)