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/os-specific/linux/cfs-zen-tweaks/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, makeWrapper
+, gawk
+}:
+
+stdenv.mkDerivation rec {
+  pname = "cfs-zen-tweaks";
+  version = "1.2.0";
+
+  src = fetchFromGitHub {
+    owner = "igo95862";
+    repo = "cfs-zen-tweaks";
+    rev = version;
+    sha256 = "HRR2tdjNmWyrpbcMlihSdb/7g/tHma3YyXogQpRCVyo=";
+  };
+
+  postPatch = ''
+    patchShebangs set-cfs-zen-tweaks.bash
+    chmod +x set-cfs-zen-tweaks.bash
+    substituteInPlace set-cfs-zen-tweaks.bash \
+      --replace '$(gawk' '$(${gawk}/bin/gawk'
+  '';
+
+  buildInputs = [
+    gawk
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    makeWrapper
+  ];
+
+  meta = with lib; {
+    description = "Tweak Linux CPU scheduler for desktop responsiveness";
+    homepage = "https://github.com/igo95862/cfs-zen-tweaks";
+    license = licenses.gpl2Only;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ mkg20001 ];
+  };
+}