<rdar://problem/13416800>

ptr_refs command frequently doesn't work when run in large applicaton. This was due to the default timeout of 500ms. The timeouts have now been increased and all expression evaluations have been modified.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@178628 91177308-0d34-0410-b5e6-96231b3b80d8