Clarify that the lookup count is incremented.
Clarify that the lookup count is incremented.

GoogleCloudPlatform/gcsfuse,BanzaiMan/gcsfuse,jacobsa/timeutil,kahing/gcsfuse,GoogleCloudPlatform/gcsfuse,mbrukman/gcsfuse,GoogleCloudPlatform/gcsfuse,BanzaiMan/gcsfuse,jacobsa/ratelimit