TBR: devtools/presubmit: don't fail the result phase when results don't exist.
TBR: devtools/presubmit: don't fail the result phase when results don't exist.

PresubmitTest: none
Change-Id: I9f28ee42d1625c3fe8fc8a7b895f43557e3a53c1

vanadium/go.devtools,vanadium/go.devtools,vanadium/go.devtools