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/servers/mirrorbits/default.nix

@@ -0,0 +1,54 @@
+{ lib, buildGoPackage, fetchFromGitHub, fetchpatch
+, pkg-config, zlib, geoip }:
+
+buildGoPackage rec {
+  pname = "mirrorbits";
+  version = "0.4";
+  rev = "v${version}";
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "etix";
+    repo = "mirrorbits";
+    sha256 = "11f9wczajba147qk5j73pxjrvlxkgr598sjvgjn2b8nxm49g2pan";
+  };
+
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/etix/mirrorbits/commit/03a4e02214bdb7bb60240ddf25b887ccac5fb118.patch";
+      sha256 = "08332cfxmp2nsfdj2ymg3lxkav8h44f6cf2h6g9jkn03mkliblm5";
+    })
+  ];
+
+  postPatch = ''
+    rm -rf testing
+  '';
+
+  # Fix build with go >=1.12
+  preBuild = ''
+    sed -i s/"_Ctype_struct_GeoIPRecordTag"/"C.struct_GeoIPRecordTag"/ ./go/src/github.com/etix/geoip/geoip.go
+  '';
+
+  goPackagePath = "github.com/etix/mirrorbits";
+  deleteVendor = true;
+  goDeps = ./deps.nix;
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ zlib geoip ];
+
+  meta = {
+    description = "geographical download redirector for distributing files efficiently across a set of mirrors";
+    homepage = "https://github.com/etix/mirrorbits";
+    longDescription = ''
+      Mirrorbits is a geographical download redirector written in Go for
+      distributing files efficiently across a set of mirrors. It offers
+      a simple and economic way to create a Content Delivery Network
+      layer using a pure software stack. It is primarily designed for
+      the distribution of large-scale Open-Source projects with a lot
+      of traffic.
+    '';
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ fpletz ];
+    platforms = lib.platforms.unix;
+  };
+}