devtools: Increase test runner timeout delay.
devtools: Increase test runner timeout delay.

One minute was not sufficient for go test -bench because the bench
flag adds a minute to timeout.

Change-Id: I88075c1da1b94c5a25425e4b35a2df253b793eef

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