Comment 13 for bug 1630906

As per the agreement, the xenial-based builders seem to be now running a newer custom kernel (4.4.0-42-generic) that seems to no longer segfault on QML code for arm64.

I suppose we can set the kernel task as Fix Released? Since I suppose CONFIG_ARM64_VA_BITS=48 is the right way to go, with Qt just needing to support it properly. This way at least we won't need to think about SRUing it to xenial to get things unblocked. Also, our touch arm64 xenial devices are unaffected as they're still using the old kernel, so no blockers here.