added HOST_COHERENT_BIT to vertex memory

From the Vulkan spec we need to add HOST_COHERENT as it says: If a memory object does not have the VK_MEMORY_PROPERTY_HOST_COHERENT_BIT property, then vkFlushMappedMemoryRanges must be called in order to guarantee that writes to the memory object from the host are made visible to the VK_ACCESS_HOST_WRITE_BIT access type, where it can be further made available to the device by synchronization commands

Author: sjfricke

tutorial05_triangle/app/src/main/jni/VulkanMain.cpp

@@ -383,7 +383,8 @@ bool CreateBuffers(void) {
 
   // Assign the proper memory type for that buffer
   MapMemoryTypeToIndex(memReq.memoryTypeBits,
-                       VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT,
+                       VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
+                       VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
                        &allocInfo.memoryTypeIndex);
 
   // Allocate memory for the buffer

tutorial06_texture/app/src/main/cpp/VulkanMain.cpp

@@ -708,7 +708,8 @@ bool CreateBuffers(void) {
 
   // Assign the proper memory type for that buffer
   MapMemoryTypeToIndex(memReq.memoryTypeBits,
-                       VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT,
+                       VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
+                       VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
                        &allocInfo.memoryTypeIndex);
 
   // Allocate memory for the buffer