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/bridge-utils/autoconf-ar.patch

@@ -0,0 +1,21 @@
+--- a/configure.ac
++++ b/configure.ac
+@@ -9,6 +9,7 @@ dnl Checks for programs.
+ AC_PROG_CC
+ AC_PROG_INSTALL
+ AC_PROG_RANLIB
++AC_CHECK_TOOL([AR], [ar])
+ 
+ dnl Checks for header files.
+ AC_HEADER_STDC
+--- a/libbridge/Makefile.in
++++ b/libbridge/Makefile.in
+@@ -1,7 +1,7 @@
+ 
+ KERNEL_HEADERS=-I@KERNEL_HEADERS@
+ 
+-AR=ar
++AR=@AR@
+ RANLIB=@RANLIB@
+ 
+ CC=@CC@

pkgs/os-specific/linux/bridge-utils/default.nix

@@ -0,0 +1,22 @@
+{ lib, stdenv, fetchurl, autoreconfHook }:
+
+stdenv.mkDerivation rec {
+  pname = "bridge-utils";
+  version = "1.7.1";
+
+  src = fetchurl {
+    url = "https://kernel.org/pub/linux/utils/net/bridge-utils/bridge-utils-${version}.tar.xz";
+    sha256 = "sha256-ph2L5PGhQFxgyO841UTwwYwFszubB+W0sxAzU2Fl5g4=";
+  };
+
+  patches = [ ./autoconf-ar.patch ];
+
+  nativeBuildInputs = [ autoreconfHook ];
+
+  meta = {
+    description = "An userspace tool to configure linux bridges (deprecated in favour or iproute2).";
+    homepage = "https://wiki.linuxfoundation.org/networking/bridge";
+    license = lib.licenses.gpl2Plus;
+    platforms = lib.platforms.linux;
+  };
+}