Add a "run ui unittests" shell script to be later used by Kokoro CI.
Add a "run ui unittests" shell script to be later used by Kokoro CI.

Copied the travis config, anything else that we should change while we're at it?

Change-Id: Iba09326239eb7e4176754219e1c468ae2a7a9ac9
google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto