<rdar://problem/12976277>

Swap in index ids for thread ids in GDBRemoteCommunicationClient. Besides dealing with the async logic, I have to take care of the situation when the inferior paused as well.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@172869 91177308-0d34-0410-b5e6-96231b3b80d8