Fix allocation size of vk transfer buffer during copy.

Bug: skia:
Change-Id: Id89964d5afd29de0ee7c4c6dd9b024891ffbfe82
Reviewed-on: https://skia-review.googlesource.com/139162
Reviewed-by: Timothy Liang <timliang@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
1 file changed