Update to the 20051223 snapshot of GCC 4.1.0.
Install the .info files of the lang/gcc41 port in a port-specific
subdirectory, and move include/mf-runtime.h into a version specific
directory. This allows us to remove the conflict with lang/gcc33,
and reduce the clash with lang/gcc42.
Also improve packaging by using @dirrm include/ssp instead of speculative