Refactors to provide two variants for evaluation of text_list:
- The original test now passes on Linux with clang because a breakpoint is hit prior to evaluation of text_list, which improves text coverage.
- The new test fails because 4 steps are requested, and only two occur prior to evaluation of text_list.
--- Note that the loss of every second "next" command can be reproduced using lldb manually with this script.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@182860 91177308-0d34-0410-b5e6-96231b3b80d8