##__VA_ARGS__ causes an error with clang if it's not preceded by a comma. The ## is
wholly unnecessary in this case so it can just be removed.

Bug b/73656151

Change-Id: Icc8a67a91b270d0e9b006cae7a438cdefa412f87
Reviewed-on: https://swiftshader-review.googlesource.com/21208Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Corentin Wallez <cwallez@google.com>