configure: Fix (Open)SSL detection on WinCE

"ssl" should be defined when "openssl" is defined, and WinCE should
default to autodetection of OpenSSL.

Change-Id: I5693923ba2d3fea1a670df556c107e6ff75e6575
Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com>
Reviewed-by: Richard J. Moore <rich@kde.org>
Reviewed-by: Björn Breitmeyer <bjoern.breitmeyer@kdab.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com>