TBR: lib/exec: attempt to fix flakiness by setting GOMAXPROCS to 1
TBR: lib/exec: attempt to fix flakiness by setting GOMAXPROCS to 1

Change-Id: Ia69ad0df45e4869baa4b497333ab3ef9ad419ff2

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref