Fix cycles backwards compatibility for specular_toon shader this actually needs
to be done in cycles itself to keep compatibility for bytecode too.

Also fix broken button to compile OSL from the text editors, this got broken after
recent change to disable editing of library linked nodes.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57362 954f8c5b-7b00-dc11-b283-0030488c597c