runqemu-ifup: enable arp proxying
This allows core-image-sato to access the WAN.
Thanks to Dexuan Cui for proposing this fix.
Fixes [YOCTO #2329]
Signed-off-by: Scott Garman <scott.a.garman@intel.com>
Signed-off-by: Elizabeth Flanagan <elizabeth.flanagan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>