Bug 949304 - Print Makefile counts during config.status; r=glandium

We now capture and print the number of Makefile.in and the number of
generated Makefile as part of config.status. This should give us a nice,
easy to extract metric going forward.

Pushing on a CLOSED TREE because this patch didn't deserve to get backed
out.

--HG--
extra : amend_source : 36028b17fd09c57455aef681bbe459891f5ed607