Fix test failure for test/functionalities/connect_remote/TestConnectRemote.py when port 12345 is already in use

Reviewed at http://reviews.llvm.org/D5221



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@217388 91177308-0d34-0410-b5e6-96231b3b80d8