packaged-staging.bbclass: Make sure target directory exists, fixing build failures

meta/classes/packaged-staging.bbclass

@@ -159,6 +159,7 @@ staging_helper () {
 		mkdir -p ${TMPDIR}${layout_libdir}/opkg/info/
 	fi
  	if [ ! -e ${TMPDIR}${layout_libdir}/ipkg/ ]; then
+		mkdir -p ${TMPDIR}${layout_libdir}/opkg
 		cd ${TMPDIR}${layout_libdir}/
 		ln -sf opkg/ ipkg
 	fi