Some alignment warnings were popping up on some windows bots.
Rather than silencing them, I just fixed them.

Change-Id: I21bc558e04498357c5d76a9caf9bd86f0a5cb540
Reviewed-on: https://swiftshader-review.googlesource.com/7131Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>