[PATCH] kbuild: distclean srctree fix

I just find a bug that ``make distclean'' cannot remove the editor backup
files and the like when using build directory.  That is because the find
command is improperly searching the build directory instead of the
$(srctree) it should.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Makefile

@@ -869,7 +869,7 @@ mrproper: clean archmrproper $(mrproper-dirs)
 .PHONY: distclean
 
 distclean: mrproper
-	@find . $(RCS_FIND_IGNORE) \
+	@find $(srctree) $(RCS_FIND_IGNORE) \
 	 	\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 	 	-o -name '.*.rej' -o -size 0 \