[cfe-dev] Add formatter option for case indention style

[Oto BREZINA via cfe-dev]

Hello,

In our Programing Style Guide for c++ we indent by tabs except for 
'case' which is indented by single space. Can this option be added into 
formatter?

IndentCaseLabels would be three value option:

* true - Indent case labels one level from the switch statement

* false - same indentation level as for the switch statement

* space - Indent case labels by single space

Have a nice day