geocode: move logging

Change-Id: I42d901510f9d8085c29792fd6b7ea8e1dc082c06
syncutil: in RWMutexTracker, log.Fatal instead of panic on double-RLock

Change-Id: Ifc34b29fb8264f96e2e9516948d9c0b4bfff984a
search: fix two double-RLock deadlocks

Change-Id: I5d083150cb1dc4e43c6a64146dee8a3672b7ea40