agl-lxc: Enable network bridge via lxc-net
On lxc-host-image-demo, network (physical ethernet) is statically
assigned to the ivi-guest space currently. This may be a bit
problematic since the other guests and also host can't use network
for some future usecases, for example we can't login to host by
ssh. This change enables network bridge settings via lxc-net to
solve this problem.
Bug-AGL: SPEC-4475
Signed-off-by: Hiroyuki Ishii <ishii.hiroyuki002@jp.panasonic.com>
Change-Id: Ic1a39b64de932f67b7be833d469ef1a80e0c52c9