Build for KWallet5 by default
Build for KWallet5 by default

Now it requires KWALLET4=1 to be passed to cmake to build the KWallet4
version, KWallet5 is built by default and does not require passing
anything now

CCMAIL: 62492fa53b76bcc7a39d0972d551205ce1b50bed@kde.org

fernando-rodriguez/kwallet-pam