Native bindings to the OES_vertex_type_10_10_10_2 extension.

This extension adds the following data formats:

Two new vertex attribute data formats: a signed 10.10.10.2 and an unsigned 10.10.10.2 vertex data format. These vertex data formats describe a 3- or 4-tuple stream which can be used to store normals or other attributes in a quantized form. Normals, tangents, binormals and other vertex attributes can often be specified at reduced precision without introducing noticeable artifacts, reducing the amount of memory and memory bandwidth they consume.