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/ditaa/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchurl, jre }:
+
+stdenv.mkDerivation rec {
+  pname = "ditaa";
+  version = "0.11.0";
+
+  src = fetchurl {
+    url = "https://github.com/stathissideris/ditaa/releases/download/v${version}/ditaa-${version}-standalone.jar";
+    sha256 = "1acnl7khz8aasg230nbsx9dyf8716scgb5l3679cb2bdzxisl64l";
+  };
+
+  dontUnpack = true;
+
+  installPhase = ''
+    mkdir -p $out/bin $out/lib
+
+    cp ${src} "$out/lib/ditaa.jar"
+
+    cat > "$out/bin/ditaa" << EOF
+    #!${stdenv.shell}
+    exec ${jre}/bin/java -jar "$out/lib/ditaa.jar" "\$@"
+    EOF
+
+    chmod a+x "$out/bin/ditaa"
+  '';
+
+  meta = with lib; {
+    description = "Convert ascii art diagrams into proper bitmap graphics";
+    homepage = "https://github.com/stathissideris/ditaa";
+    sourceProvenance = with sourceTypes; [ binaryBytecode ];
+    license = licenses.lgpl3;
+    platforms = platforms.unix;
+    maintainers = [ maintainers.bjornfor ];
+  };
+}