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/tools/system/uefitool/common.nix

@@ -0,0 +1,41 @@
+{ version, sha256, installFiles }:
+{ lib, mkDerivation, fetchFromGitHub, qtbase, qmake, cmake, zip }:
+
+mkDerivation rec {
+  passthru = {
+    inherit version;
+    inherit sha256;
+    inherit installFiles;
+  };
+  pname = "uefitool";
+  inherit version;
+
+  src = fetchFromGitHub {
+    inherit sha256;
+    owner = "LongSoft";
+    repo = pname;
+    rev = version;
+  };
+
+  buildInputs = [ qtbase ];
+  nativeBuildInputs = [ qmake cmake zip ];
+
+  dontConfigure = true;
+  buildPhase = ''
+    bash unixbuild.sh
+  '';
+
+  installPhase = ''
+    mkdir -p "$out"/bin
+    cp ${lib.concatStringsSep " " installFiles} "$out"/bin
+  '';
+
+  meta = with lib; {
+    description = "UEFI firmware image viewer and editor";
+    homepage = "https://github.com/LongSoft/uefitool";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ ajs124 ];
+    # uefitool supposedly works on other platforms, but their build script only works on linux in nixpkgs
+    platforms = platforms.linux;
+  };
+}

pkgs/tools/system/uefitool/variants.nix

@@ -0,0 +1,15 @@
+{ libsForQt5 }:
+let
+  common = opts: libsForQt5.callPackage (import ./common.nix opts) {};
+in rec {
+  new-engine = common rec {
+    version = "A59";
+    sha256 = "0m6hkj33vr75mrpjpdc0l38xv64kq73ph2mr2v9bs3wx4qlvg606";
+    installFiles = [ "UEFITool/UEFITool" "UEFIFind/UEFIFind" "UEFIExtract/UEFIExtract" ];
+  };
+  old-engine = common rec {
+    version = "0.28.0";
+    sha256 = "1n2hd2dysi5bv2iyq40phh1jxc48gdwzs414vfbxvcharcwapnja";
+    installFiles = [ "UEFITool" "UEFIReplace/UEFIReplace" "UEFIPatch/UEFIPatch" ];
+  };
+}