Remove PACKED_TV build.

Reviewed By: @jdelong

Differential Revision: D1751273

Signature: t1:1751273:1419802792:156367ffb6d9c9aabd30548aa4d798813ffed39d
Remove SQLite version restriction

Summary: If a fix for initializing the hhvm bytecode repository is merged
then this version restriction is no longer necessary.

My POC attempt is at: https://github.com/facebook/hhvm/pull/4507
Closes https://github.com/facebook/hhvm/pull/4510

Reviewed By: @sgolemon

Differential Revision: D1758891

Signature: t1:1758891:1419877060:c92e00f9dc0450ee3201da6914dabefdecf01751