Don't hold the ThreadList lock over calls to the GetStatus (Process or Thread) calls
or the lower levels of the Process won't be able to restart.

<rdar://problem/16244835>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@203233 91177308-0d34-0410-b5e6-96231b3b80d8