automake: Globally add stub automake targets to the old Makefiles.

automake: Globally add stub automake targets to the old Makefiles.

I tried to update all the old Makefiles that included the default
config to be sure they had a default target if they didn't previously
have one, since this new all target will always point at it.  Almost
everything had one.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>