Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of mstensho@chromium.org

dbus_unittests failing on chromium.linux/Linux Tests (dbg)(1)(32)

Builders failed on: 
- Linux Tests (dbg)(1)(32): 
  https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20Tests%20%28dbg%29%281%29%2832%29

Sheriff notes:
SignalSenderVerificationTest.TestSignalRejected is flaky, and appears to fail a couple of times a month or so.
https://findit-for-me.appspot.com/waterfall/list-flakes?test_name=SignalSenderVerificationTest.TestSignalRejected