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/networking/isync/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchurl, pkg-config, perl
+, openssl, db, cyrus_sasl, zlib
+, Security
+}:
+
+stdenv.mkDerivation rec {
+  pname = "isync";
+  version = "1.4.4";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/isync/${pname}-${version}.tar.gz";
+    sha256 = "1zq0wwvmqsl9y71546dr0aygzn9gjjfiw19hlcq87s929y4p6ckw";
+  };
+
+  nativeBuildInputs = [ pkg-config perl ];
+  buildInputs = [ openssl db cyrus_sasl zlib ]
+    ++ lib.optionals stdenv.isDarwin [ Security ];
+
+  meta = with lib; {
+    homepage = "http://isync.sourceforge.net/";
+    # https://sourceforge.net/projects/isync/
+    changelog = "https://sourceforge.net/p/isync/isync/ci/v${version}/tree/NEWS";
+    description = "Free IMAP and MailDir mailbox synchronizer";
+    longDescription = ''
+      mbsync (formerly isync) is a command line application which synchronizes
+      mailboxes. Currently Maildir and IMAP4 mailboxes are supported. New
+      messages, message deletions and flag changes can be propagated both ways.
+    '';
+    license = licenses.gpl2Plus;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ primeos lheckemann ];
+    mainProgram = "mbsync";
+  };
+}