xorg.libXft: add color emoji rendering support

https://gitlab.freedesktop.org/xorg/lib/libxft/merge_requests/1

pkgs/servers/x11/xorg/overrides.nix

@@ -182,6 +182,16 @@ self: super:
     propagatedBuildInputs = [ self.libXrender freetype fontconfig ];
     configureFlags = attrs.configureFlags or []
       ++ malloc0ReturnsNullCrossFlag;
+
+    patches = [
+      # Adds color emoji rendering support.
+      # https://gitlab.freedesktop.org/xorg/lib/libxft/merge_requests/1
+      (fetchpatch {
+        url = "https://gitlab.freedesktop.org/xorg/lib/libxft/commit/fe41537b5714a2301808eed2d76b2e7631176573.patch";
+        sha256 = "045lp1q50i2wlwvpsq6ycxdc6p3asm2r3bk2nbad1dwkqw2xf9jc";
+      })
+    ];
+
     # the include files need ft2build.h, and Requires.private isn't enough for us
     postInstall = ''
       sed "/^Requires:/s/$/, freetype2/" -i "$dev/lib/pkgconfig/xft.pc"