strace: Resume target threads with the debugger API not resume_thread().

This way, the thread will be resumed only after the kernel
has finished processing our debugger change requests written
to the same port.

src/bin/debug/strace/strace.cpp

@@ -815,8 +815,8 @@ main(int argc, const char *const *argv)
 			exit(1);
 		}
 
-		// resume the target thread to be sure, it's running
+		// resume the target thread to be sure it's running
-		resume_thread(threadID);
+		continue_thread(nubPort, threadID);
 	}
 
 	thread_id currentThreadID = -1;