qca-ossl: Fix build without SSLv3
qca-ossl: Fix build without SSLv3

This fixes building with LibreSSL >= 2.3.0 which has removed support
for SSLv3 completely. As far as I know OpenSSL can be configured to
build without it, so it might be helpful there as well.

REVIEW: 125386

KDE/qca,KDE/qca,KDE/qca,KDE/qca