installer: action for the "UTC versus local time" question is reversed

[Tim Darby <t+dfbsd@xxxxxxxxxxxx>]

In usr.sbin/installer/dfuibe_installer/fn_configure.c, it appears that if you answer "Yes" to the question "Is this machine's CMOS clock set to UTC?", the installer will add the file /etc/wall_cmos_clock, which is what should happen if the CMOS clock is set to local time.

Tim