"make distclean" breaks.
* edit/Makefile.in, gnome/Makefile.in, gtkedit/Makefile.in,
slang/Makefile.in, src/Makefile.in, vfs/Make-mc.in: $(RMF)
replaced with "rm -f" - the stangard says that "rm" is portable.
Ditto $(MV). Adjusted *clean targets to match those in
Automake. Removed "cross" target.