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/applications/misc/usync/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, scsh, rsync, unison }:
+
+stdenv.mkDerivation rec {
+  pname = "usync";
+  version = "0.0.3";
+
+  src = fetchFromGitHub {
+    owner = "ebzzry";
+    repo = "usync";
+    rev = "99f11b0c196a81843f55ca3456abcb85149b6d51";
+    sha256 = "16i1q8f0jmfd43rb8d70l2b383vr5ib4kh7iq3yd345q7xjz9c2j";
+  };
+
+  installPhase = ''
+    install -m 555 -Dt $out/bin $pname
+  '';
+
+  postFixup = ''
+    substituteInPlace $out/bin/$pname --replace "/usr/bin/env scsh" "${scsh}/bin/scsh"
+    substituteInPlace $out/bin/$pname --replace "(rsync " "(${rsync}/bin/rsync "
+    substituteInPlace $out/bin/$pname --replace "(unison " "(${unison}/bin/unison "
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/ebzzry/usync";
+    description = "A simple site-to-site synchronization tool";
+    license = licenses.mit;
+    maintainers = [ maintainers.ebzzry ];
+    platforms = platforms.unix;
+  };
+
+  dontBuild = true;
+}