Eliminate circular dependence on f77-runtime that caused build failures.

	* Make-lang.in (f77): Delete f77-runtime.
	(f77.all.build, f77.all.cross, f77.rest.encap): Add f77-runtime.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@14873 138bc75d-0d04-0410-961f-82ee72b054a4