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/blktrace/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchurl, libaio }:
+
+stdenv.mkDerivation rec {
+  pname = "blktrace";
+  version = "1.3.0";
+
+  # Official source
+  # "git://git.kernel.org/pub/scm/linux/kernel/git/axboe/blktrace.git"
+  src = fetchurl {
+    url = "https://brick.kernel.dk/snaps/blktrace-${version}.tar.bz2";
+    sha256 = "sha256-1t7aA4Yt4r0bG5+6cpu7hi2bynleaqf3yoa2VoEacNY=";
+  };
+
+  buildInputs = [ libaio ];
+
+  preConfigure = ''
+    sed s,/usr/local,$out, -i Makefile
+  '';
+
+  meta = with lib; {
+    description = "Block layer IO tracing mechanism";
+    maintainers = with maintainers; [ ];
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+  };
+}