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/tools/protoc-gen-doc/default.nix

@@ -0,0 +1,30 @@
+{ buildGoModule, fetchFromGitHub, lib }:
+
+buildGoModule rec {
+  pname = "protoc-gen-doc";
+  version = "1.5.1";
+
+  src = fetchFromGitHub {
+    owner = "pseudomuto";
+    repo = "protoc-gen-doc";
+    rev = "v${version}";
+    sha256 = "sha256-19CN62AwqQGq5Gb5kQqVYhs+LKsJ9K2L0VAakwzPD5Y=";
+  };
+
+  vendorSha256 = "sha256-K0rZBERSKob5ubZW28QpbcPhgFKOOASkd9UyC9f8gyQ=";
+
+  meta = with lib; {
+    description = "Documentation generator plugin for Google Protocol Buffers";
+    longDescription = ''
+      This is a documentation generator plugin for the Google Protocol Buffers
+      compiler (protoc). The plugin can generate HTML, JSON, DocBook and
+      Markdown documentation from comments in your .proto files.
+
+      It supports proto2 and proto3, and can handle having both in the same
+      context.
+    '';
+    homepage = "https://github.com/pseudomuto/protoc-gen-doc";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kalbasit ];
+  };
+}