[PATCH] cpp11-migrate: Add a class to support include directives modifications (Windows bot fix)

[Guillaume Papin]

  It broke the windows bots again:
  - http://bb.pgr.jp/builders/ninja-clang-i686-msc17-R/builds/4176
  - http://bb.pgr.jp/builders/cmake-clang-i686-mingw32/builds/3837

  Reverted by r189037.

  I need to investigate but I will start being short on solutions. I don't see anything left that is specific to Windows and the build errors are not really helpful.

http://llvm-reviews.chandlerc.com/D1438

BRANCH
  include-directives

ARCANIST PROJECT
  clang-tools-extra