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/uhub/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchpatch, fetchFromGitHub, cmake, openssl, sqlite, pkg-config
+, systemd, tlsSupport ? false }:
+
+assert tlsSupport -> openssl != null;
+
+stdenv.mkDerivation rec {
+  pname = "uhub";
+  version = "unstable-2019-12-13";
+
+  src = fetchFromGitHub {
+    owner = "janvidar";
+    repo = "uhub";
+    rev = "35d8088b447527f56609b85b444bd0b10cd67b5c";
+    hash = "sha256-CdTTf82opnpjd7I9TTY+JDEZSfdGFPE0bq/xsafwm/w=";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ sqlite systemd ] ++ lib.optional tlsSupport openssl;
+
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace "/usr/lib/uhub/" "$out/plugins" \
+      --replace "/etc/uhub" "$TMPDIR"
+  '';
+
+  cmakeFlags = [
+    "-DSYSTEMD_SUPPORT=ON"
+    "-DSSL_SUPPORT=${if tlsSupport then "ON" else "OFF"}"
+  ];
+
+  meta = with lib; {
+    description = "High performance peer-to-peer hub for the ADC network";
+    homepage = "https://www.uhub.org/";
+    license = licenses.gpl3;
+    maintainers = [ maintainers.ehmry ];
+    platforms = platforms.unix;
+  };
+}