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/aws-c-mqtt/default.nix

@@ -0,0 +1,48 @@
+{ lib, stdenv
+, fetchFromGitHub
+, aws-c-cal
+, aws-c-common
+, aws-c-compression
+, aws-c-http
+, aws-c-io
+, cmake
+, s2n-tls
+}:
+
+stdenv.mkDerivation rec {
+  pname = "aws-c-mqtt";
+  version = "0.7.10";
+
+  src = fetchFromGitHub {
+    owner = "awslabs";
+    repo = "aws-c-mqtt";
+    rev = "v${version}";
+    sha256 = "sha256-efkRr36FbLyS9tgE/ZF3tcmhQ4f5C5ySTlgzThbqv2I=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  buildInputs = [
+    aws-c-cal
+    aws-c-common
+    aws-c-compression
+    aws-c-http
+    aws-c-io
+    s2n-tls
+  ];
+
+  cmakeFlags = [
+    "-DCMAKE_SKIP_BUILD_RPATH=OFF"
+    "-DBUILD_SHARED_LIBS=ON"
+  ];
+
+  meta = with lib; {
+    description = "C99 implementation of the MQTT 3.1.1 specification";
+    homepage = "https://github.com/awslabs/aws-c-mqtt";
+    license = licenses.asl20;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ r-burns ];
+  };
+}