udplogserver: Do not automatically add a new line to log outputs.

tools/udplogserver/main.cpp

@@ -90,7 +90,7 @@ int main(int argc, char **argv)
 
          if (recvd > 0) {
             buffer[recvd] = 0;
-            std::cout << buffer << std::endl;
+            std::cout << buffer;
          }
       }
    }