luajit: point /usr/bin/lua to luajit if lua not selected

The luajit package is a provider of a lua interpreter, but does not install a
lua executable.  This is fine for scripts that explicitly invoke luajit, but
not so good for scripts that just need a lua interpreter and call lua.  This
mod creates a lua symlink so that the non-jit-specific scripts will still work.

Signed-off-by: Danomi Manchego <danomimanchego123@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/luajit/luajit.mk

@@ -64,6 +64,11 @@ define LUAJIT_INSTALL_TARGET_CMDS
 	$(MAKE) PREFIX="/usr" DESTDIR="$(TARGET_DIR)" LDCONFIG=true -C $(@D) install
 endef
 
+define LUAJIT_INSTALL_SYMLINK
+	ln -fs luajit $(TARGET_DIR)/usr/bin/lua
+endef
+LUAJIT_POST_INSTALL_TARGET_HOOKS += LUAJIT_INSTALL_SYMLINK
+
 define HOST_LUAJIT_BUILD_CMDS
 	$(MAKE) PREFIX="/usr" BUILDMODE=static -C $(@D) amalg
 endef