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/monitoring/mtail/default.nix

@@ -0,0 +1,33 @@
+{ lib, fetchFromGitHub, buildGoModule }:
+
+buildGoModule rec {
+  pname = "mtail";
+  version = "3.0.0-rc46";
+
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "mtail";
+    rev = "v${version}";
+    sha256 = "sha256-/PiwrXr/oG/euWDOqcXvKKvyvQbp11Ks8LjmmJjDtdU=";
+  };
+
+  vendorSha256 = "sha256-aBGJ+JJjm9rt7Ic90iWY7vGtZQN0u6jlBnAMy1nivQM=";
+
+  doCheck = false;
+
+  subPackages = [ "cmd/mtail" ];
+
+  preBuild = ''
+    go generate -x ./internal/vm/
+  '';
+
+  ldflags = [
+    "-X main.Version=${version}"
+  ];
+
+  meta = with lib; {
+    license = licenses.asl20;
+    homepage = "https://github.com/google/mtail";
+    description = "Tool for extracting metrics from application logs";
+  };
+}