tools: Add veyron-javascript-test-unit to vom.js presubmit
tools: Add veyron-javascript-test-unit to vom.js presubmit

As title. The former is dependent on changes in the latter.

Change-Id: Ica09eb7058cda319c5a0a1f5a2d43aa7ba19f3ad

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