Use mixed indentations so that the code are aligned regardless the tab
width.

Bug: b/115344057
Change-Id: I9476c1b8ba5a518787dc76f50e1805b1b9d06e82
Reviewed-on: https://swiftshader-review.googlesource.com/21028Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Tested-by: Chris Forbes <chrisforbes@google.com>