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/applications/misc/ericw-tools/default.nix

@@ -0,0 +1,48 @@
+{ lib, stdenv, fetchFromGitHub
+, gtest, fmt
+, cmake, ninja, installShellFiles
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ericw-tools";
+  version = "0.18.1";
+
+  src = fetchFromGitHub {
+    owner = "ericwa";
+    repo = "ericw-tools";
+    rev = "v${version}";
+    sha256 = "11sap7qv0rlhw8q25azvhgjcwiql3zam09q0gim3i04cg6fkh0vp";
+  };
+  postUnpack = ''
+    pushd source/3rdparty
+    ln -s ${fmt.src} fmt
+    ln -s ${gtest.src} googletest
+    popd
+  '';
+
+  nativeBuildInputs = [ cmake ninja installShellFiles ];
+
+  outputs = [ "out" "doc" "man" ];
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    for TOOL in bspinfo bsputil light qbsp vis ; do
+      cp -a $TOOL/$TOOL $out/bin/
+    done
+
+    installManPage ../man/*.?
+
+    mkdir -p $doc/share/doc/ericw-tools
+    cp -a ../README.md ../changelog.txt $doc/share/doc/ericw-tools/
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://ericwa.github.io/ericw-tools/";
+    description = "Map compile tools for Quake and Hexen 2";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ astro ];
+  };
+}