Fix file headers. NFC

llvm-svn: 355176
diff --git a/clang/tools/libclang/Indexing.cpp b/clang/tools/libclang/Indexing.cpp
index d666d4b..ad3dc70 100644
--- a/clang/tools/libclang/Indexing.cpp
+++ b/clang/tools/libclang/Indexing.cpp
@@ -1,4 +1,4 @@
-//===- CIndexHigh.cpp - Higher level API functions ------------------------===//
+//===- Indexing.cpp - Higher level API functions --------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.