fix comm selection

package/cfgfs/Makefile

@@ -11,7 +11,7 @@ PKG_SECTION:=		base/apps
 PKG_URL:=		http://openadk.org/
 
 PKG_CFLINE_CFGFS:=	select BUSYBOX_COMM@
-PKG_CFLINE_CFGFS:=	select BUSYBOX_DIFF@
+PKG_CFLINE_CFGFS+=	select BUSYBOX_DIFF@
 PKG_CFLINE_CFGFS+=	select BUSYBOX_MD5SUM@
 PKG_CFLINE_CFGFS+=	select BUSYBOX_XARGS@
 PKG_CFLINE_CFGFS+=	select BUSYBOX_FEATURE_SORT_BIG@