uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/libraries/libunity/default.nix

@@ -0,0 +1,70 @@
+{ lib
+, stdenv
+, fetchgit
+, pkg-config
+, glib
+, vala
+, dee
+, gobject-introspection
+, libdbusmenu
+, gtk3
+, intltool
+, python3
+, autoreconfHook
+}:
+
+stdenv.mkDerivation {
+  pname = "libunity";
+  version = "unstable-2021-02-01";
+
+  outputs = [ "out" "dev" "py" ];
+
+  # Obtained from https://git.launchpad.net/ubuntu/+source/libunity/log/
+  src = fetchgit {
+    url = "https://git.launchpad.net/ubuntu/+source/libunity";
+    rev = "import/7.1.4+19.04.20190319-5";
+    sha256 = "LHUs6kl1srS6Xektx+jmm4SXLR47VuQ9IhYbBxf2Wc8=";
+  };
+
+  patches = [
+    # Fix builf with latest Vala
+    # https://code.launchpad.net/~jtojnar/libunity/libunity
+    # Did not send upstream because Ubuntu is stuck on Vala 0.48.
+    ./fix-vala.patch
+  ];
+
+  nativeBuildInputs = [
+    autoreconfHook
+    gobject-introspection
+    intltool
+    pkg-config
+    python3
+    vala
+  ];
+
+  buildInputs = [
+    glib
+    gtk3
+  ];
+
+  propagatedBuildInputs = [
+    dee
+    libdbusmenu
+  ];
+
+  preConfigure = ''
+    intltoolize
+  '';
+
+  configureFlags = [
+    "--with-pygi-overrides-dir=${placeholder "py"}/${python3.sitePackages}/gi/overrides"
+  ];
+
+  meta = with lib; {
+    description = "A library for instrumenting and integrating with all aspects of the Unity shell";
+    homepage = "https://launchpad.net/libunity";
+    license = licenses.lgpl3;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ ];
+  };
+}

pkgs/development/libraries/libunity/fix-vala.patch

@@ -0,0 +1,12 @@
+--- a/protocol/protocol-icon.vala	2013-08-27 12:53:57 +0000
++++ b/protocol/protocol-icon.vala	2021-04-13 22:34:41 +0000
+@@ -185,7 +185,7 @@
+   }
+ 
+   /* Added to GIcon interface in 2.37 */
+-  private Variant serialize ()
++  private Variant? serialize ()
+   {
+     Variant? ret = null;
+     return ret;
+