Disabling tracing on library

hw/rtl/libs/VX_onehot_encoder.v

@@ -3,6 +3,7 @@
 // Fast encoder using parallel prefix computation
 // Adapter from BaseJump STL: http://bjump.org/data_out.html
 
+`TRACING_OFF
 module VX_onehot_encoder #(
     parameter N       = 1,    
     parameter REVERSE = 0,
@@ -102,4 +103,5 @@ module VX_onehot_encoder #(
         assign valid_out = (| data_in);
     end
 
-endmodule
+endmodule
+`TRACING_ON