profiles: package.use.stable.mask dev-perl/DBD-SQLite[system-sqlite]

profiles: package.use.stable.mask dev-perl/DBD-SQLite[system-sqlite]

- Using versions of system sqlite other than the one DBD-SQLite ships
 with causes regular issues that challenge the ability for tis package
 to have a meaning stability status
- Restricting system sqlite versions to solve the above problem causes
 significant impediments to stabilizing sqlite. ( DBD-SQLites release
 cycle is somewhat behind that of SQLites )

Bug: https://bugs.gentoo.org/641108
Bug: https://bugs.gentoo.org/649408
Bug: https://bugs.gentoo.org/640724