Makefile.in: Removed "foo:: foo-$(WHAT)" lines from the Makefile

Makefile.in: Removed "foo:: foo-$(WHAT)" lines from the Makefile

aclocal.m4 (MAKE_SUBDIRS, DO_SUBDIRS): MAKE_SUBDIRS now takes three
	arguments; DO_SUBDIRS now generates target rules of the form:
	"foo-unix: <for each subdirectory> make foo".  All of the macros
	which generated targets "all", "install", "clean", etc. now generate
	targets "all-unix", "install-unix", "clean-unix".

	This scheme allows us to do multiple-platform builds, while
	preserving ordering constraints that we need in order to build
	library subdirectories correctly.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@6854 dc483132-0cff-0310-8789-dd5450dbe970