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/ttylog/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "ttylog";
+  version = "0.31";
+
+  src = fetchFromGitHub {
+    owner = "rocasa";
+    repo = "ttylog";
+    rev = version;
+    sha256 = "0c746bpjpa77vsr88fxk8h1803p5np1di1mpjf4jy5bv5x3zwm07";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  meta = with lib; {
+    homepage = "http://ttylog.sourceforge.net";
+    description = "Simple serial port logger";
+    longDescription = ''
+      A serial port logger which can be used to print everything to stdout
+      that comes from a serial device.
+    '';
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+  };
+}