Add one -j1 run before going full V=s when forcing

Signed-off-by: Michal Hrusecky <Michal@Hrusecky.net>

compile_fw

@@ -346,6 +346,7 @@ build() {
 		make $MAKE_DEBUG IS_TTY=1 BUILD_LOG=1 $BUILD_ARGS $OWRT_DEBUG
 	else
 		make $MAKE_DEBUG IGNORE_ERRORS=m IS_TTY=1 BUILD_LOG=1 $BUILD_ARGS $OWRT_DEBUG || \
+		make $MAKE_DEBUG IGNORE_ERRORS=m IS_TTY=1 BUILD_LOG=1 $BUILD_ARGS $OWRT_DEBUG -j1 || \
 		make $MAKE_DEBUG IGNORE_ERRORS=m IS_TTY=1 BUILD_LOG=1 $BUILD_ARGS $OWRT_DEBUG -j1 V=s
 	fi
 	BUILD_END="$(date +%s)"