dpdk: set NIX_ENFORCE_NO_NATIVE = 0 to fix build

Since 0c6db0ca48 the build would fail
since it relies on sse instructions.

cc @abbradar to be sure this is correct fix

pkgs/os-specific/linux/dpdk/default.nix

@@ -14,6 +14,9 @@ stdenv.mkDerivation rec {
   RTE_KERNELDIR = "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build";
   RTE_TARGET = "x86_64-native-linuxapp-gcc";
 
+  # we need sse3 instructions to build
+  NIX_ENFORCE_NO_NATIVE = "0";
+
   enableParallelBuilding = true;
   outputs = [ "out" "examples" ];