mesa: Add ARB_vertex_attrib_binding

update_array() and update_array_format() are changed to update the new
attrib and binding states, and the client arrays become derived state.

Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/main/context.c

@@ -678,6 +678,10 @@ _mesa_init_constants(struct gl_context *ctx)
    ctx->Const.MaxAtomicBufferSize = MAX_ATOMIC_COUNTERS * ATOMIC_COUNTER_SIZE;
    ctx->Const.MaxCombinedAtomicBuffers = MAX_COMBINED_ATOMIC_BUFFERS;
    ctx->Const.MaxCombinedAtomicCounters = MAX_ATOMIC_COUNTERS;
+
+   /* GL_ARB_vertex_attrib_binding */
+   ctx->Const.MaxVertexAttribRelativeOffset = 2047;
+   ctx->Const.MaxVertexAttribBindings = MAX_VERTEX_GENERIC_ATTRIBS;
 }