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/bzrtp/default.nix

@@ -0,0 +1,35 @@
+{ bctoolbox
+, cmake
+, fetchFromGitLab
+, sqlite
+, lib
+, stdenv
+}:
+
+stdenv.mkDerivation rec {
+  pname = "bzrtp";
+  version = "5.1.12";
+
+  src = fetchFromGitLab {
+    domain = "gitlab.linphone.org";
+    owner = "public";
+    group = "BC";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-GsHVuNXzLkbKUaHtnyXAr7bR9Emc55zcmKt3RGjCMtA=";
+  };
+
+  buildInputs = [ bctoolbox sqlite ];
+  nativeBuildInputs = [ cmake ];
+
+  # Do not build static libraries
+  cmakeFlags = [ "-DENABLE_STATIC=NO" "-DCMAKE_C_FLAGS=-Wno-error=cast-function-type" ];
+
+  meta = with lib; {
+    description = "An opensource implementation of ZRTP keys exchange protocol. Part of the Linphone project.";
+    homepage = "https://gitlab.linphone.org/BC/public/bzrtp";
+    license = licenses.gpl3Plus;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ jluttine ];
+  };
+}