Implement basic allocation readback.  Add Get height, width to ScriptC_Lib.
diff --git a/libs/rs/rsAllocation.h b/libs/rs/rsAllocation.h
index eb1da69..00af9ed 100644
--- a/libs/rs/rsAllocation.h
+++ b/libs/rs/rsAllocation.h
@@ -60,6 +60,8 @@
     void subData(uint32_t xoff, uint32_t yoff, uint32_t zoff,
                  uint32_t w, uint32_t h, uint32_t d, const void *data);
 
+    void read(void *data);
+
     void enableGLVertexBuffers() const;
     void setupGLIndexBuffers() const;