Structured comment parsing, first step.

* Retain comments in the AST
* Serialize/deserialize comments
* Find comments attached to a certain Decl
* Expose raw comment text and SourceRange via libclang


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158771 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index 594a796..d24960b 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -5,6 +5,8 @@
 clang_CXXMethod_isStatic
 clang_CXXMethod_isVirtual
 clang_Cursor_getArgument
+clang_Cursor_getCommentRange
+clang_Cursor_getRawCommentText
 clang_Cursor_getNumArguments
 clang_Cursor_getObjCSelectorIndex
 clang_Cursor_getSpellingNameRange