SQLite: Enable fdatasync for SQLite

SQLite library recommends usage of fdatasync when available.
Since it is available for linux, enable it. This gives better
performance compared to fsync.

Change-Id: I47d5fb9cb1e8331729b54d77f10f7499e028269d
Add hooks for database open and pragma handling

Change-Id: I0c1843a1c17e6cb7786ea5c66d229282b1fa0d32

SQLite: Updated hooks for database open and close.

Change-Id: I38135eaed3b5e66ef302eb0337f1bf3ba9f184d7

Leave out magic perf code unless requested

Change-Id: I154e288e440abd70dd4eec590150be1e800efac9