Call Process::Finalize directly in Debugger::Destroy, rather than having it done 
in the Process destructor.  Doing it there can be too late depending on what the internal state
and ProcessGDBRemote Async threads are doing.

<rdar://problem/13297536>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@176203 91177308-0d34-0410-b5e6-96231b3b80d8