veyron/services/wsprd: Added more logging to find race condition in testwriter.
veyron/services/wsprd: Added more logging to find race condition in
testwriter.

Change-Id: I0ad4f8d057ee28bd99706a1db78f85005da5f5e5

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