emacs: enable strictDeps

This also fixes build of Emacs 30 withNS on darwin because now Emacs
checks the correct compiler (clang instead of gcc) for Objective-C.
See https://github.com/NixOS/nixpkgs/pull/529324 for more info.

pkgs/applications/editors/emacs/make-emacs.nix

@@ -238,6 +238,8 @@ stdenv.mkDerivation (finalAttrs: {
     ""
   ];
 
+  strictDeps = true;
+
   nativeBuildInputs = [
     makeWrapper
     pkg-config
@@ -246,7 +248,8 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optionals srcRepo [
     autoreconfHook
   ]
-  ++ lib.optionals (withPgtk || withX && (withGTK3 || withXwidgets)) [ wrapGAppsHook3 ];
+  ++ lib.optionals (withPgtk || withX && (withGTK3 || withXwidgets)) [ wrapGAppsHook3 ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ sigtool ];
 
   buildInputs = [
     gnutls
@@ -338,9 +341,6 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optionals withWebkitgtk [
     webkitgtk_4_1
   ]
-  ++ lib.optionals stdenv.hostPlatform.isDarwin [
-    sigtool
-  ]
   ++ lib.optionals withNS [
     librsvg
   ]