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/elementary-cmake-modules/default.nix

@@ -0,0 +1,29 @@
+{ stdenv, lib, fetchFromGitHub, cmake, pkg-config }:
+
+stdenv.mkDerivation {
+  pname = "elementary-cmake-modules";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "elementary";
+    repo = "cmake-modules";
+    rev = "319ec5336e9f05f3f22b886cc2053ef3d4b6599e";
+    sha256 = "191hhvdxyqvh9axzndaqld7vrmv7xkn0czks908zhb2zpjhv9rby";
+  };
+
+  prePatch = ''
+    substituteInPlace CMakeLists.txt  \
+      --replace ' ''${CMAKE_ROOT}/Modules' " $out/lib/cmake"
+  '';
+
+  propagatedBuildInputs = [ cmake pkg-config ];
+
+  setupHook = ./setup-hook.sh;
+
+  meta = with lib; {
+    platforms = platforms.linux ++ platforms.darwin;
+    homepage = "https://github.com/elementary/cmake-modules";
+    license = licenses.gpl3Plus;
+    maintainers = [ maintainers.samdroid-apps ];
+  };
+}

pkgs/development/libraries/elementary-cmake-modules/setup-hook.sh

@@ -0,0 +1,4 @@
+_elementaryCMakeEnvHook() {
+  cmakeFlagsArray+=(-DCMAKE_MODULE_PATH=@out@/lib/cmake)
+}
+addEnvHooks "$targetOffset" _elementaryCMakeEnvHook