added timeout of 10 seconds
added timeout of 10 seconds

Discovered issue with steamCMD sometimes getting stuck for an unknown
reason. Causing the update command not to ever finish. I have added a
timeout of 10 seconds so should it fail it will quit the updater.

GameServerManagers/LinuxGSM,GameServerManagers/LinuxGSM,dgibbs64/linuxgsm,Maxximou5/linuxgameservers,Maxximou5/linuxgameservers,dgibbs64/linuxgsm