lua: enable native build only in luarocks plugin

plugins/luarocks/lua.mk

@@ -0,0 +1,7 @@
+# This file is part of MXE.
+# See index.html for further information.
+
+# enable native build for luarocks
+# leave build rule in src/lua.mk for other uses (i.e. build-pkg)
+
+lua_TARGETS  := $(BUILD) $(MXE_TARGETS)

src/lua.mk

@@ -10,7 +10,6 @@ $(PKG)_CHECKSUM := c740c7bb23a936944e1cc63b7c3c5351a8976d7867c5252c8854f7b2af9da
 $(PKG)_SUBDIR   := lua-$($(PKG)_VERSION)
 $(PKG)_FILE     := lua-$($(PKG)_VERSION).tar.gz
 $(PKG)_URL      := http://www.lua.org/ftp/$($(PKG)_FILE)
-$(PKG)_TARGETS  := $(BUILD) $(MXE_TARGETS)
 $(PKG)_DEPS     := gcc
 $(PKG)_DEPS_$(BUILD) :=