Replace KF5_VERSION with KF_VERSION
Replace KF5_VERSION with KF_VERSION

Frameworks will be Frameworks 6 at some point and there is no good reason to have the major version in the variable name.

Given this is purely internal we can to this now, making it a bit more future-proof

GIT_SILENT

NO_CHANGELOG

KDE/kjs,KDE/kjs,KDE/kjs,KDE/kjs,KDE/kjs,KDE/kjs