qtquick3d: Add module prefix for enabling assimp
qtquick3d: Add module prefix for enabling assimp

Lately qtquick 3D changed this option to avoid some conflicts see [1]

Fixes #314

[1] https://github.com/qt/qtquick3d/commit/b14b14e9194708cf02df1149bd735f6ce245c3e4

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

meta-qt5/meta-qt5,meta-qt5/meta-qt5,schnitzeltony/meta-qt5,schnitzeltony/meta-qt5