hooks: add net-firewall/ebtables to the /var exception

BUG=b:150613151
TEST=emerge-mistral ebtables now succeeds

Change-Id: I9b6711c448e25def584b61fb577a39bec99593f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2081837
Tested-by: Aileen Cheng <chengaileen@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed