gitignore: ignore all driver build dirs (build4_*)

The driver builds into build4_$(date +%Y%m%d_%H%M%S)_$; the old build4_2* pattern only covered current-year timestamps. Ignore the whole family so build artifacts stop showing up as untracked.
2026-11-13 20:10:21 +01:00
1 parent 5538ff7c6e
commit e4de02f27c
@@ -14,4 +14,5 @@ build/
 build2/
 .envrc
 build4
+build4_*
 deb_build_tmp