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/misc/automirror/default.nix

@@ -0,0 +1,26 @@
+{lib, stdenv, fetchFromGitHub, git, ronn}:
+
+stdenv.mkDerivation rec {
+  pname = "automirror";
+  version = "49";
+
+  src = fetchFromGitHub {
+    owner = "schlomo";
+    repo = "automirror";
+    rev = "v${version}";
+    sha256 = "1syyf7dcm8fbyw31cpgmacg80h7pg036dayaaf0svvdsk0hqlsch";
+  };
+
+  patchPhase = "sed -i s#/usr##g Makefile";
+
+  buildInputs = [ git ronn ];
+
+  installFlags = [ "DESTDIR=$(out)" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/schlomo/automirror";
+    description = "Automatic Display Mirror";
+    license = licenses.gpl3;
+    platforms = platforms.all;
+  };
+}