Add iproute2 and net-tools back to SDK

iproute2 and net-tools required for some of the packages' unit tests.
Without them the unittest for update_engine fails to setup local network
config required to run the tests.

BUG=b/309848929
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I6b521c551d55081c110aebb3e31aa452f0795ba9
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/61000
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
1 file changed