Preparing libRS for for compilation on host.

Change-Id: I851add79831331c8a8b20dcccdb0817f8ad0c359
diff --git a/rs.spec b/rs.spec
index 29de5f0..4c8b5db 100644
--- a/rs.spec
+++ b/rs.spec
@@ -140,7 +140,7 @@
 ContextSetSurface {
 	param uint32_t width
 	param uint32_t height
-	param ANativeWindow *sur
+	param RsNativeWindow sur
 	}
 
 ContextDump {