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/qca2/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchurl, openssl, cmake, pkg-config, qt, darwin }:
+
+stdenv.mkDerivation rec {
+  pname = "qca";
+  version = "2.2.1";
+
+  src = fetchurl {
+    url = "http://download.kde.org/stable/qca/${version}/qca-${version}.tar.xz";
+    sha256 = "00kv1vsrc8fp556hm8s6yw3240vx3l4067q6vfxrb3gdwgcd45np";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ openssl qt ]
+    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+
+  # tells CMake to use this CA bundle file if it is accessible
+  preConfigure = ''
+    export QC_CERTSTORE_PATH=/etc/ssl/certs/ca-certificates.crt
+  '';
+
+  # tricks CMake into using this CA bundle file if it is not accessible (in a sandbox)
+  cmakeFlags = [ "-Dqca_CERTSTORE=/etc/ssl/certs/ca-certificates.crt" ];
+
+  postPatch = ''
+    sed -i -e '1i cmake_policy(SET CMP0025 NEW)' CMakeLists.txt
+  '';
+
+  meta = with lib; {
+    description = "Qt Cryptographic Architecture";
+    license = "LGPL";
+    homepage = "http://delta.affinix.com/qca";
+    maintainers = [ maintainers.sander ];
+    platforms = platforms.unix;
+  };
+}