cause its called icuucd under debug windows

and change the runtime load to try icuucd if MSVC_USE_DEBUG_RUNTIME
was in use at compile time

Change-Id: I10fbe4890a24364a45ae5993ad7e8079ac3fd182
Reviewed-on: https://gerrit.libreoffice.org/28210Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>