Add missing qml runtime dependency.

Scarlett Gately Moorerequested to merge
sgmoore/kdeclarative:master into master

Merge missing qml runtime dependency from neon. Verified that it is indeed required: https://github.com/KDE/kdeclarative/blob/ecfcc48c84e49f6ff97b05a51df0917aeec0224c/src/qmlcontrols/kquickcontrols/ColorButton.qml

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