To match the keywords of luajit.
Looking good on ppc. # cat fennel-903742.report USE tests started on Sa 5. Aug 14:44:02 CEST 2023 FEATURES=' test' USE='lua_single_target_luajit' succeeded for =dev-lang/fennel-1.3.1 USE='lua_single_target_lua5-3 -lua_single_target_lua5-4 -lua_single_target_luajit' succeeded for =dev-lang/fennel-1.3.1 USE='-lua_single_target_lua5-3 lua_single_target_lua5-4 -lua_single_target_luajit' succeeded for =dev-lang/fennel-1.3.1 USE='-lua_single_target_lua5-3 -lua_single_target_lua5-4 lua_single_target_luajit' succeeded for =dev-lang/fennel-1.3.1
arm64 done
arm done
ppc done all arches done