[PATCH] uml: partial KBUILD_OUTPUT fix

Start fixing KBUILD_OUTPUT support for UML.  These changes are trivial and
no-ops when this feature is not enabled - the "hard part" of this support
is under discussion because it's hard to do properly (UML uses both shipped
and build-generated headers from a lot of different directories, and for
good reasons).
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

@@ -29,14 +29,14 @@ MAKEFILE-$(CONFIG_MODE_TT) += Makefile-tt
 MAKEFILE-$(CONFIG_MODE_SKAS) += Makefile-skas
 
 ifneq ($(MAKEFILE-y),)
-  include $(addprefix $(ARCH_DIR)/,$(MAKEFILE-y))
+  include $(addprefix $(srctree)/$(ARCH_DIR)/,$(MAKEFILE-y))
 endif
 
 ARCH_INCLUDE	:= -I$(ARCH_DIR)/include
 SYS_DIR		:= $(ARCH_DIR)/include/sysdep-$(SUBARCH)
 
-include $(ARCH_DIR)/Makefile-$(SUBARCH)
-include $(ARCH_DIR)/Makefile-os-$(OS)
+include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
+include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 
 # -Derrno=kernel_errno - This turns all kernel references to errno into
 # kernel_errno to separate them from the libc errno.  This allows -fno-common