Error when attempting to generate an SSH key for remote building

Error is displayed when attempting to generate an SSH key.

Unexpected remote arg: EngineQA@10.1.110.49:.ssh/RemoteToolChainPrivate.key
rsync error: syntax or usage error (code 1) at /home/lapo/packaging/rsync-3.0.4-1/src/rsync-3.0.4/main.c(1202) [sender=3.0.4]

This is a regression from 4.13.2

Could not reproduce in a P4 build

1. Open any project in the editor
2. Open Project Settings -> iOS -> Build -> Remote Build
3. Enter the IP and username for the remote mac
4. Click on Generate SSH Key button
5. Follow directions in the prompt to generate a key

Result: Error is displayed in the command prompt