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/os-specific/linux/linuxptp/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchurl, linuxHeaders } :
+
+
+stdenv.mkDerivation rec {
+  pname = "linuxptp";
+  version = "3.1.1";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/linuxptp/${pname}-${version}.tgz";
+    sha256 = "1nf0w4xyzg884v8blb81zkk6q8p6zbiq9lx61jdqwbbzkdgqbmll";
+  };
+
+  postPatch = ''
+    substituteInPlace incdefs.sh --replace \
+       '/usr/include/linux/' "${linuxHeaders}/include/linux/"
+  '';
+
+  makeFlags = [ "prefix=" ];
+
+  preInstall = ''
+    export DESTDIR=$out
+  '';
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "Implementation of the Precision Time Protocol (PTP) according to IEEE standard 1588 for Linux";
+    homepage = "http://linuxptp.sourceforge.net/";
+    maintainers = [ maintainers.markuskowa ];
+    license = licenses.gpl2Only;
+    platforms = platforms.linux;
+  };
+}