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/rmfakecloud/default.nix

@@ -0,0 +1,31 @@
+{ lib, fetchFromGitHub, buildGoModule }:
+
+buildGoModule rec {
+  pname = "rmfakecloud";
+  version = "0.0.7";
+
+  src = fetchFromGitHub {
+    owner = "ddvk";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-Ax+eozbAIE3425ndT4z4fVBMwzLN7iR5fTz8rz60zWg=";
+  };
+
+  vendorSha256 = "sha256-NwDaPpjkQogXE37RGS3zEALlp3NuXP9RW//vbwM6y0A=";
+
+  postPatch = ''
+    # skip including the JS SPA, which is difficult to build
+    sed -i '/go:/d' ui/assets.go
+  '';
+
+  ldflags = [
+    "-s" "-w" "-X main.version=v${version}"
+  ];
+
+  meta = with lib; {
+    description = "Host your own cloud for the Remarkable";
+    homepage = "https://ddvk.github.io/rmfakecloud/";
+    license = licenses.agpl3Only;
+    maintainers = with maintainers; [ pacien martinetd ];
+  };
+}