Really sort the #include lines in unittests/...

I forgot to re-sort after fixing main module headers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169244 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/AST/CommentParser.cpp b/unittests/AST/CommentParser.cpp
index f9bf58c..343d32d 100644
--- a/unittests/AST/CommentParser.cpp
+++ b/unittests/AST/CommentParser.cpp
@@ -8,7 +8,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/AST/CommentParser.h"
-#include "clang/Basic/SourceManager.h"
 #include "clang/AST/Comment.h"
 #include "clang/AST/CommentCommandTraits.h"
 #include "clang/AST/CommentLexer.h"
@@ -16,6 +15,7 @@
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/DiagnosticOptions.h"
 #include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Allocator.h"
 #include "gtest/gtest.h"