Will help diagnose a timeout failure on Windows Intel.
Also reduce the significant digits in time output.

Bug: angleproject:3162
Change-Id: I6d6a852f572875f613dec8e4ab6e798dfde0ca9b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2420331
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>