lua: create lua symlink for host installation

Since the binaries for both lua as well as lua5.3 contain the version
number, invocations of the "lua" binary are failing, as it's not created
anymore for the host package.

Fixes: fe59b46 ("lua: include version number in installed files")
Signed-off-by: David Bauer <mail@david-bauer.net>

package/utils/lua/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=lua
 PKG_VERSION:=5.1.5
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.lua.org/ftp/ \
@@ -133,6 +133,8 @@ define Host/Install
 	$(MAKE) -C $(HOST_BUILD_DIR) \
 		INSTALL_TOP="$(STAGING_DIR_HOSTPKG)" \
 		install
+
+	$(LN) $(STAGING_DIR_HOSTPKG)/bin/lua5.1 $(STAGING_DIR_HOSTPKG)/bin/lua
 endef
 
 define Build/InstallDev