sysutils/cbsd: update to 11.1.12

• Update to 11.1.12 [1];
• Add 'pkgconfig' to USES as it's now uses it to check sqlite libs. This release also fixes build when databases/sqlite3 was built with ICU=on [2].

PR: 225319 [1], 214551 [2]
Submitted by: maintainer [1], Pavel Volkov [2]
Reported by: jbeich [2]