transformFeedbackEnabled represents flags, not a single value,
so it should not have been of type bool.

Change-Id: I723660a84e0ecfd42d361511d8b445d40d6d31a8
Reviewed-on: https://swiftshader-review.googlesource.com/5063Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>