Added instruction to 5.3 to skip to 5.6 if the build succeeds.

5-Add-virtual-motors.md

@@ -101,6 +101,8 @@ index 9692f5a..14855f8 100644
 
 ### 5.3 Rebuild the IOC (Attempt #1)
 
+If the following build succeeds, proceed to [step 5.6](5-Add-virtual-motors.md#56-confirm-the-libvmc-is-included-in-the-iocs-binary).
+
 ```
 $ make
 ```