libubox: add build dependency on lua

SVN-Revision: 34022

package/libs/libubox/Makefile

@@ -17,6 +17,8 @@ PKG_LICENSE_FILES:=
 
 PKG_MAINTAINER:=Felix Fietkau <[email protected]>
 
+PKG_BUILD_DEPENDS:=lua
+
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk