QMAKE_FRAMEWORK_VERSION has a fallback to VER_MAJ (which derives from
VERSION), so it's pretty much always set, thus defeating the previous
check.
amends 6cb495de.
Task-number: QTBUG-46215
Change-Id: I2c5560c469617ebeab978e4de78df00baf38d49d
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>