Recommit lldb realtime output for POSIX.
 -Adds workaround for assertion in lldb for TestEvents.py


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177116 91177308-0d34-0410-b5e6-96231b3b80d8
Add some logging to track cases where “step-in” steps out due to the avoid-regexp and the step-in target.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177117 91177308-0d34-0410-b5e6-96231b3b80d8