Native bindings to the EXT_shared_texture_palette extension.

EXT_shared_texture_palette defines a shared texture palette which may be used in place of the texture object palettes provided by EXT_paletted_texture. This is useful for rapidly changing a palette common to many textures, rather than having to reload the new palette for each texture. The extension acts as a switch, causing all lookups that would normally be done on the texture's palette to instead use the shared palette.

Requires EXT_paletted_texture.