Add an option to parse all comments as documentation comments

Patch by Amin Shali.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179180 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index cf93d1c..03e33ad 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -1069,6 +1069,7 @@
        I != IEnd; ++I) {
     AddString(*I, Record);
   }
+  Record.push_back(LangOpts.CommentOpts.ParseAllComments);
 
   Stream.EmitRecord(LANGUAGE_OPTIONS, Record);