boost: disable coroutine for non-x86_64 builds.

Coroutine depends on context which is also disabled in this case.

Closes #21225.
qt, qt5: use opt_prefix with d-bus.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
qt, qt5: don't depend on png, jpeg.

Closes #21255.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
qt: update bottles to remove png linking.

Closes #21296.