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/tools/admin/pebble/default.nix

@@ -0,0 +1,30 @@
+{ buildGoPackage
+, fetchFromGitHub
+, lib
+, nixosTests
+}:
+
+buildGoPackage rec {
+  pname = "pebble";
+  version = "2.3.1";
+
+  goPackagePath = "github.com/letsencrypt/${pname}";
+
+  src = fetchFromGitHub {
+    owner = "letsencrypt";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-S9+iRaTSRt4F6yMKK0OJO6Zto9p0dZ3q/mULaipudVo=";
+  };
+
+  passthru.tests = {
+    smoke-test = nixosTests.acme;
+  };
+
+  meta = {
+    homepage = "https://github.com/letsencrypt/pebble";
+    description = "A miniature version of Boulder, Pebble is a small RFC 8555 ACME test server not suited for a production CA";
+    license = [ lib.licenses.mpl20 ];
+    maintainers = lib.teams.acme.members;
+  };
+}