Fix CMake standalone build.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@194363 91177308-0d34-0410-b5e6-96231b3b80d8
The Threads created when requesting extended backtraces need to be owned by
something; add a new ExtendedThreadList to Process where they can be retained
for the duration of a public stop.
<rdar://problem/15314068> 


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@194366 91177308-0d34-0410-b5e6-96231b3b80d8
The Threads created when requesting extended backtraces need to be owned by
something; add a new ExtendedThreadList to Process where they can be retained
for the duration of a public stop.
<rdar://problem/15314068> 



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@194367 91177308-0d34-0410-b5e6-96231b3b80d8