Add include for gflags autocomplete
Add include for gflags autocomplete

Change-Id: I7368cc3144a6387c98cf510bd8344f5058c4e2c0

zhanshenman/TheiaSfM,zhanshenman/TheiaSfM,zhanshenman/TheiaSfM,zhanshenman/TheiaSfM,zhanshenman/TheiaSfM