Dump comments in -ast-dump.
http://llvm-reviews.chandlerc.com/D269

"Added dumping of declaration comments in ASTDumper. This required moving the
comment dumping code from CommentDumper so that the indentation is correct."

Patch by Philip Craig!



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172409 91177308-0d34-0410-b5e6-96231b3b80d8