[PATCH] uml: readd linux Makefile target

Since people are used to doing "make linux ARCH=um" and to use "linux" as
the kernel image, make it be an hard link to vmlinux.  This should hurt the
less possible the users (actually nothing) while not slowing down the
build.
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/Makefile

@@ -62,6 +62,18 @@ ifeq ($(CONFIG_MODE_SKAS), y)
 $(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
 endif
 
+all: linux
+
+linux: vmlinux
+	$(RM) $@
+	ln $< $@
+
+define archhelp
+  echo '* linux		- Binary kernel image (./linux) - for backward'
+  echo '		   compatibility only: now you can simply run'
+  echo '		   the vmlinux binary you find in the kernel root.'
+endef
+
 prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS) \
 	$(ARCH_DIR)/kernel/vmlinux.lds.S