SwiftShader's debug version was too slow for Chromium's debug
trybots. To solve this issue, SwiftShader now always builds
its release version in Chromium.

'git cl format' was ran in Chromium to ensure proper formatting
of the gn files.

Change-Id: I346045b68b566813ab6ab739aaa6eeb243d51853
Reviewed-on: https://swiftshader-review.googlesource.com/11188Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>