src: Make the call to chmod in ibus_bus_init conditional
src: Make the call to chmod in ibus_bus_init conditional

BUG=https://github.com/ibus/ibus/issues/1996

fujiwarat/ibus,fujiwarat/ibus,ibus/ibus,ibus/ibus,fujiwarat/ibus,ibus/ibus,fujiwarat/ibus,ibus/ibus