Support separate depth and stencil buffers.

Bug 27460431

Change-Id: If11e16597b3fdfbfa6f1f2282e287b302b541f63
Reviewed-on: https://swiftshader-review.googlesource.com/4976
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
10 files changed