Blender Git Loki

Fix OCIO Shader Compilation Error.

Compilation fails when our OCIO wrapper creates a shader that
transfer first to scene ref and directly after that to display.
This cause is that the GPU resources of both transfers had the same
name. This is fixed by prefixing the resources.

This can be reproduced by loading a movie file (mkv) in the VSE editor.
Reported by Sergey Sharybin.