The full-text search engine version 3 (FTS3) and R*Tree (RTREE) modules are
enabled by default in sqlite3; add config options which allow to disable these
sqlite lib modules.
Disabling FTS3 reduces the so file with 475KB while disabling RTREE reduces
the so file with 121KB on x86 architecture.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>