python: Add unsigned arrays.

src/gallium/state_trackers/python/gallium.i

@@ -58,6 +58,7 @@
 %include "carrays.i"
 %array_class(unsigned char, ByteArray);
 %array_class(int, IntArray);
+%array_class(unsigned, UnsignedArray);
 %array_class(float, FloatArray);
 
 
@@ -606,4 +607,4 @@ error1:
    void dump(unsigned flags = 0) {
       tgsi_dump($self->tokens, flags);
    }
-}
+}