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/glpng/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, stdenv
+, fetchFromRepoOrCz
+, cmake
+, libGL
+, libpng
+, pkg-config
+, zlib
+}:
+
+stdenv.mkDerivation rec {
+  pname = "glpng";
+  version = "1.46";
+
+  src = fetchFromRepoOrCz {
+    repo = "glpng";
+    rev = "v${version}";
+    hash = "sha256-C7EHaBN0PE/HJB6zcIaYU63+o7/MEz4WU1xr/kIOanM=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    libGL
+    libpng
+    zlib
+  ];
+
+  meta = with lib; {
+    homepage = "https://repo.or.cz/glpng.git/blob_plain/HEAD:/glpng.htm";
+    description = "PNG loader library for OpenGL";
+    license = licenses.mit;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = platforms.unix;
+  };
+}