Patch SQLite to cover the CVEs reported

The following CVE’s were submitted on SQLite.
https://nvd.nist.gov/vuln/detail/CVE-2019-19244
https://nvd.nist.gov/vuln/detail/CVE-2019-19603
https://nvd.nist.gov/vuln/detail/CVE-2019-19242
https://nvd.nist.gov/vuln/detail/CVE-2019-19646
https://nvd.nist.gov/vuln/detail/CVE-2019-19645

Next SQLite release is planned to 2019-12-31 (https://sqlite.org/draft/releaselog/3_31_0.html).

Would be nice if next releases of Qt would contain it.