use third-party sqlite3 if pkg-config reports version 3.8.5 installed

Summary: - not sure of the actual incompatibility, but HHVM fails to initialize the central repository with sqlite3 version 3.8.5

Closes https://github.com/facebook/hhvm/pull/3270

Reviewed By: @ptarjan

Differential Revision: D1455370

Pulled By: svcscm