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/govers/default.nix

@@ -0,0 +1,20 @@
+{ lib, buildGoPackage, fetchFromGitHub }:
+
+buildGoPackage rec {
+  pname = "govers";
+  version = "unstable-2016-06-23";
+
+  goPackagePath = "github.com/rogpeppe/govers";
+
+  src = fetchFromGitHub {
+    owner = "rogpeppe";
+    repo = "govers";
+    rev = "77fd787551fc5e7ae30696e009e334d52d2d3a43";
+    sha256 = "sha256-lpc8wFKAB+A8mBm9q3qNzTM8ktFS1MYdIvZVFP0eiIs=";
+  };
+
+  dontRenameImports = true;
+
+  doCheck = false; # fails, silently
+
+}