suppress bug after compiling last package in kamikaze SDK.

This patch corrects https://dev.openwrt.org/ticket/2508
An error was raised when no Config.in file was found in package/
Signed-off-by: Julien Pinon <julien.pinon@luceor.com>

SVN-Revision: 9692

target/sdk/files/Makefile

@@ -74,9 +74,9 @@ world: FORCE
 	$(MAKE) package/compile
 	-( \
 		cd package; \
-		find . -maxdepth 2 -name Config.in | \
-			sed -e 's,/Config.in,,g' | \
-			xargs -n1 $(MAKE) compile -C; \
+		for configfile in `find . -maxdepth 2 -name Config.in` ; do \
+			$(MAKE) compile -C `dirname $$configfile` ; \
+		done \
 	)
 
 clean: FORCE