[sysmon] Skip virtual network interfaces

BUG=chromium:657194
TEST=Test sysmon on shard

Change-Id: I6e3b8f324b9b283d8fe0489779db013dab6f6bf2
Reviewed-on: https://chromium-review.googlesource.com/400644
Commit-Ready: Dan Shi <dshi@google.com>
Tested-by: Allen Li <ayatane@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>
1 file changed