Added the missing part of the FenceSync object implementation based on the assumption that all fence operations are always signaled before calling any sync related wait functions. Passes all related dEQP tests. Change-Id: I2fd2ac160dfd1250f55240fc3f696f00579d12d4 Reviewed-on: https://swiftshader-review.googlesource.com/8855Tested-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Nicolas Capens <capn@google.com>
