autotest: chaos: log connection attempt to dut syslog

For ease of log triage, stamp dut syslog with connection attempt number
and SSID when checking AP configuration.

BUG=None
TEST=test_that $DUT network_WiFi_ChaosConnectDisconnect.local

Change-Id: Ia281f8a9d0e305f3b3110c946220695c3c1a4a9c
Reviewed-on: https://chromium-review.googlesource.com/176701
Reviewed-by: Jason Abele <jabele@chromium.org>
Tested-by: Jason Abele <jabele@chromium.org>
Commit-Queue: Jason Abele <jabele@chromium.org>
2 files changed