Use QSQLITE driver instead of QSQLITE3
Use QSQLITE driver instead of QSQLITE3

QSQLITE3 is Akonadi's custom driver, which may not always be available
and brings nothing better for our use case.

REVIEW: 114523

detrout/libkpeople-debian,detrout/libkpeople-debian,detrout/libkpeople-debian