Change ref type for vkCmd(Fill|Update)Buffer to CompleteWrite
Change ref type for vkCmd(Fill|Update)Buffer to CompleteWrite

`vkCmdFillBuffer` and `vkCmdUpdateBuffer` each replace the contents of the
buffer in the specified interval, so this should be treated as a CompleteWrite.

googlestadia/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,googlestadia/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,baldurk/renderdoc,googlestadia/renderdoc