- Completed implementation of round
  and hyperbolic trigonometry operations
- Added a few more cases in op to string
  functions

Change-Id: Ic09d228de8e4446a66152b70edc6a6bba511288a
Reviewed-on: https://swiftshader-review.googlesource.com/2891Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>