add a newline

tools/run_tests/performance/remote_host_prepare.sh

@@ -41,4 +41,4 @@ ssh "${USER_AT_HOST}" "rm -rf ~/performance_workspace && mkdir -p ~/performance_
 
 # push the current sources to the slave and unpack it.
 scp ../grpc.tar "${USER_AT_HOST}:~/performance_workspace"
-ssh "${USER_AT_HOST}" "tar -xf ~/performance_workspace/grpc.tar -C ~/performance_workspace"
\ No newline at end of file
+ssh "${USER_AT_HOST}" "tar -xf ~/performance_workspace/grpc.tar -C ~/performance_workspace"