treewide: set meta.license on hooks

pkgs/development/interpreters/lua-5/wrap-lua.nix

@@ -1,4 +1,5 @@
 {
+  lib,
   lua,
   makeSetupHook,
   makeWrapper,
@@ -13,4 +14,5 @@ makeSetupHook {
   substitutions.luaHost = lua.luaOnHostForHost;
   substitutions.luarocksBuild = lua.luaOnBuildForHost.pkgs.luarocks_bootstrap;
   substitutions.luarocksHost = lua.luaOnHostForHost.pkgs.luarocks_bootstrap;
+  meta.license = lib.licenses.mit;
 } ./wrap.sh