Sanitise strings printed when received from target control/remote server

* Given socket corruption or network errors these strings could contain
  unprintable characters so we sanitise them reasonably. This also ameliorates a
  potential security concern with arbitrary strings being written to a log, but
  these connections are still considered trusted and users should not be
  exposing RenderDoc ports to the internet.

renderdoc/core/remote_server.cpp

@@ -464,7 +464,7 @@ static void ActiveRemoteClientThread(ClientThread *threadData,
 
       reader.EndChunk();
 
-      RDCLOG("Taking ownership of '%s'.", path.c_str());
+      RDCLOG("Taking ownership of capture.");
 
       tempFiles.push_back(path);
     }