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/libraries/prometheus-cpp/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, gbenchmark
+, gtest
+, civetweb
+, zlib
+, curl
+}:
+
+stdenv.mkDerivation rec {
+  pname = "prometheus-cpp";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "jupp0r";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "L6CXRup3kU1lY5UnwPbaOwEtCeAySNmFCPmHwsk6cRE=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ gbenchmark gtest zlib curl ];
+  propagatedBuildInputs = [ civetweb ];
+  strictDeps = true;
+
+  cmakeFlags = [
+    "-DUSE_THIRDPARTY_LIBRARIES=OFF"
+    "-DBUILD_SHARED_LIBS=ON"
+  ];
+
+  outputs = [ "out" "dev" ];
+
+  postInstall = ''
+    mkdir -p $dev/lib/pkgconfig
+    substituteAll ${./prometheus-cpp.pc.in} $dev/lib/pkgconfig/prometheus-cpp.pc
+  '';
+
+  meta = {
+    description = "Prometheus Client Library for Modern C++";
+    homepage = "https://github.com/jupp0r/prometheus-cpp";
+    license = [ lib.licenses.mit ];
+  };
+
+}