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/libmatroska/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub, cmake, pkg-config
+, libebml }:
+
+stdenv.mkDerivation rec {
+  pname = "libmatroska";
+  version = "1.6.3";
+
+  src = fetchFromGitHub {
+    owner  = "Matroska-Org";
+    repo   = "libmatroska";
+    rev    = "release-${version}";
+    sha256 = "01dg12ndxfdqgjx5v2qy4mff6xjdxglywyg82sr3if5aw6rp3dji";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+
+  buildInputs = [ libebml ];
+
+  cmakeFlags = [
+    "-DBUILD_SHARED_LIBS=YES"
+    "-DCMAKE_INSTALL_PREFIX="
+  ];
+
+  meta = with lib; {
+    description = "A library to parse Matroska files";
+    homepage = "https://matroska.org/";
+    license = licenses.lgpl21;
+    maintainers = with maintainers; [ spwhitt ];
+    platforms = platforms.unix;
+  };
+}