Exclude kconf_update from being catched by uac on Windows

Summary:
Exclude kconf_update from being catched by uac on Windows

FIXED-IN:4.14.40
BUG:384334

Test Plan:
Compiled at https://build.opensuse.org/package/show/windows%3Amingw%3Awin32/mingw32-kdelibs4
and tested with KMyMoney snapshot for Windows downloadable
from https://software.opensuse.org/package/mingw32-kmymoney-portable

Reviewed at https://git.reviewboard.kde.org/r/130239/