wasm: issues with bitfield packing

emscripten seems to have issues with bitfield packing such as:

quint32 enabled : 1;

in which this is always false.

See https://github.com/kripken/emscripten/issues/4540

There are quite a few places in which Qt / Declarative uses these, such as
QGraphicsItem. One result, as mentioned above, is that the item is never enabled.

This is to discuss the best work around.

Changing the declaration to

quint32 enabled; 

will make this work as intended.

This change would be trival, but the number of variables with bitfields makes this rather invasive.