Temporary hack: Force the use of `signal_dumper` as timeout handler on host.

The use of signal_dumper has been globally disabled in
`test/etc/run-test-jar` since
https://android-review.googlesource.com/c/platform/art/+/1144349/
(commit 352482c000830755405f5da3624891ff4690a36a) in order to get
finer observations of the process timing out in
`test/testrunner/testrunner.py`, implemented (as a temporary measure)
in https://android-review.googlesource.com/c/platform/art/+/1145595
(commit 2bd8bfd716d4b07d7df017596af7b8394006cf38).

Force-restore the use of `signal_dumper` in `test/etc/run-test-jar` on
host, so that we can get backtraces when a host run-test times out.

Test: Test the code path locally with very low timeout.
Test: Rely on the Android Build (master-art-host) and the ART Buildbot.
Bug: 144333851
Bug: 144360582
Change-Id: I3960f0b4346de0bf640ba0b671c21b4025550d76
1 file changed