tools: added compute-hops and dump-hops tools

As these tools work closely together with fail components, its
easiest, to build them in this context. As these tools don't
really matter for fail use, they might never be pushed to the
master branch.

Change-Id: I8c8bd80376d0475f08a531a995d829e85032371b

src/core/comm/InjectionPointHopsMessage.proto

@@ -5,7 +5,12 @@ message InjectionPointMessage {
 	
 	// If checkpoint must be used for this hop chain, id is set properly
 	optional uint32 checkpoint_id = 1;
-	
+
+    // If we need to knwo the target dynamic instruction offset,
+    // here it is
+    optional uint32 target_trace_position = 4; 
+
+
 	// Repeated groups can't be defined as notempty, so a manual
 	// non-empty check is required at usage 
 	
@@ -20,4 +25,4 @@ message InjectionPointMessage {
 		}
 		required AccessType accesstype = 2;
 	}
-}
+}