Fix vk spurious crashes (#25)
Fix vk spurious crashes (#25)

* Remove vulkanisation (now done by generator)

* Improve busy-wait loop for vk worker

* Grab more buffers of adb logcat

google/graphicsfuzz,google/graphicsfuzz,google/graphicsfuzz,google/graphicsfuzz,google/graphicsfuzz,google/graphicsfuzz,google/graphicsfuzz