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/servers/unfs3/default.nix

@@ -0,0 +1,37 @@
+{ fetchurl, lib, stdenv, flex, bison }:
+
+stdenv.mkDerivation rec {
+  pname = "unfs3";
+  version = "0.9.22";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/unfs3/${pname}-${version}.tar.gz";
+    sha256 = "076zkyqkn56q0a8n3h65n1a68fknk4hrrp6mbhajq5s1wp5248j8";
+  };
+
+  nativeBuildInputs = [ flex bison ];
+
+  configureFlags = [ "--disable-shared" ];
+
+  doCheck = false;                                # no test suite
+
+  meta = {
+    description = "User-space NFSv3 file system server";
+
+    longDescription =
+      '' UNFS3 is a user-space implementation of the NFSv3 server
+         specification.  It provides a daemon for the MOUNT and NFS
+         protocols, which are used by NFS clients for accessing files on the
+         server.
+      '';
+
+    homepage = "http://unfs3.sourceforge.net/";
+
+    license = lib.licenses.bsd3;
+    platforms = lib.platforms.unix;
+    maintainers = [ ];
+
+    # https://github.com/unfs3/unfs3/issues/13
+    broken = true;
+  };
+}