Update a subset of a buffer object's data store

Property definitions

glesv2 :: glesv2 $ Sys :: glBufferSubData
# Update a subset of a buffer object's data store
fun glBufferSubData(target: GLArrayBuffer, offset, size: Int, data: Pointer) `{
	glBufferSubData(target, offset, size, data);
`}
lib/glesv2/glesv2.nit:954,1--957,2