Vulkan: Select graphics queue with compute capabilities.

There might be cases that the graphics queue and compute
queue are separated, but that would be something that we
will solve in the future.

intern/ghost/intern/GHOST_ContextVK.cpp

@@ -520,7 +520,8 @@ static GHOST_TSuccess getGraphicQueueFamily(VkPhysicalDevice device, uint32_t *r
 
   *r_queue_index = 0;
   for (const auto &queue_family : queue_families) {
-    if (queue_family.queueFlags & VK_QUEUE_GRAPHICS_BIT) {
+    if ((queue_family.queueFlags & VK_QUEUE_GRAPHICS_BIT) &&
+        (queue_family.queueFlags & VK_QUEUE_COMPUTE_BIT)) {
       return GHOST_kSuccess;
     }
     (*r_queue_index)++;