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/tools/graphics/jpegexiforient/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchurl }:
+stdenv.mkDerivation {
+  pname = "jpegexiforient";
+  version = "unstable-2002-02-17";
+  src = fetchurl {
+    url = "http://sylvana.net/jpegcrop/jpegexiforient.c";
+    sha256 = "1v0f42cvs0397g9v46p294ldgxwbp285npg6npgnlnvapk6nzh5s";
+  };
+  unpackPhase = ''
+    cp $src jpegexiforient.c
+  '';
+  buildPhase = ''
+    $CC -o jpegexiforient jpegexiforient.c
+  '';
+  installPhase = ''
+    install -Dt $out/bin jpegexiforient
+  '';
+  meta = with lib; {
+    description = "Utility program to get and set the Exif Orientation Tag";
+    homepage = "http://sylvana.net/jpegcrop/exif_orientation.html";
+    # Website doesn't mention any license, but I think it's safe to assume this
+    # to be free since it's from IJG, the current maintainers of libjpeg
+    license = licenses.free;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ infinisil ];
+  };
+}