cp11-migrate: Integration with LibFormat

    
Adding a feature to optionally reformat code changed by the migrator. Like
LibFormat, can choose between built-in styles (LLVM, Mozilla, Google, Chromium)
or use a YAML-format config file.

Now with no dependency on iostream by the Reformatting.cpp LIT test.

Author: Guillaume Papin <guillaume.papin@epitech.eu>
llvm-svn: 186938