meson: Specify -Wformat as a common warning flag for extensions

When Who What
2024-07-20 14:14:11 Andrew Dunstan (adunstan) Closed in commitfest 2024-07 with status: Committed
2024-07-20 14:14:11 Andrew Dunstan (adunstan) Changed committer to petere
2024-04-09 06:28:05 Andrey Borodin (x4m) Closed in commitfest 2024-03 with status: Moved to next CF
2024-03-08 05:39:56 Tristan Partin (tristan957) New status: Ready for Committer
2024-03-05 15:58:36 Tristan Partin (tristan957) Added tristan957 as reviewer
2024-01-25 00:37:31 Kouhei Sutou (kou) Changed authors to Kouhei Sutou (kou)
2024-01-25 00:36:53 Kouhei Sutou (kou) Attached mail thread 20240122.141139.931086145628347157.kou@clear-code.com
2024-01-25 00:36:53 Kouhei Sutou (kou) Created patch record