RFS(M): 8005031: Some cleanup in c2 to prepare for incremental inlining support

[Roland Westrelin]

>>> PrintInliningChunk --> PrintInliningEvent
>>> _print_inlining_chunks --> _print_inlining_list
> 
> While I'm in favor of using something else than Chunk it seems that Event is not a good name choice given all the JFR events coming soon.  Maybe Message?

What about PrintInliningBuffer (often, there will be more than one inlining message per buffer) and _print_inlining_list?

Roland.