fix(loop): Replace deprecated xorg dependencies with standalone packages

Replace deprecated xorg.* references with their standalone package
names to eliminate build warnings about renamed packages.

packages/loop/package.nix

@@ -15,7 +15,14 @@
   dbus,
   cups,
   libxkbcommon,
-  xorg,
+  libx11,
+  libxcomposite,
+  libxdamage,
+  libxext,
+  libxfixes,
+  libxrandr,
+  libxcb,
+  libxshmfence,
   systemd,
   libnotify,
   libsecret,
@@ -54,14 +61,14 @@ stdenv.mkDerivation {
     dbus
     cups
     libxkbcommon
-    xorg.libX11
+    libx11
-    xorg.libXcomposite
+    libxcomposite
-    xorg.libXdamage
+    libxdamage
-    xorg.libXext
+    libxext
-    xorg.libXfixes
+    libxfixes
-    xorg.libXrandr
+    libxrandr
-    xorg.libxcb
+    libxcb
-    xorg.libxshmfence
+    libxshmfence
     systemd
     libnotify
     libsecret