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/can-utils/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "can-utils";
+  # There are no releases (source archives or git tags), so use the date of the
+  # latest commit in git master as version number.
+  version = "20170830";
+
+  src = fetchFromGitHub {
+    owner = "linux-can";
+    repo = "can-utils";
+    rev = "5b518a0a5fa56856f804372a6b99b518dedb5386";
+    sha256 = "1ygzp8rjr8f1gs48mb1pz7psdgbfhlvr6kjdnmzbsqcml06zvrpr";
+  };
+
+  # Fixup build with newer Linux headers.
+  postPatch = ''
+    sed '1i#include <linux/sockios.h>' -i \
+      slcanpty.c cansniffer.c canlogserver.c isotpdump.c isotpsniffer.c isotpperf.c
+  '';
+
+  preConfigure = ''makeFlagsArray+=(PREFIX="$out")'';
+
+  meta = with lib; {
+    description = "CAN userspace utilities and tools (for use with Linux SocketCAN)";
+    homepage = "https://github.com/linux-can/can-utils";
+    license = licenses.gpl2Plus;
+    platforms = platforms.linux;
+    maintainers = [ maintainers.bjornfor ];
+  };
+}