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/admin/fbvnc/default.nix

@@ -0,0 +1,30 @@
+{lib, stdenv, fetchFromGitHub}:
+stdenv.mkDerivation rec {
+  name = "${pname}-${version}";
+  pname = "fbvnc";
+  version = "1.0.2";
+
+  src = fetchFromGitHub {
+    owner = "zohead";
+    repo = pname;
+    sha256 = "0lkr4j1wsa05av2g9w99rr9w4j4k7a21vp36x0a3h50y8bmgwgm1";
+    rev = "783204ff6c92afec33d6d36f7e74f1fcf2b1b601";
+  };
+
+  buildInputs = [];
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp fbvnc "$out/bin"
+    mkdir -p "$out/share/doc/${pname}"
+    cp README* "$out/share/doc/${pname}"
+  '';
+
+  meta = {
+    description = "Framebuffer VNC client";
+    license = lib.licenses.bsd3;
+    maintainers = [lib.maintainers.raskin];
+    platforms = lib.platforms.linux;
+    homepage = "https://github.com/zohead/fbvnc/";
+  };
+}