Fix file headers. NFC

llvm-svn: 355176
diff --git a/clang/lib/Sema/SemaCoroutine.cpp b/clang/lib/Sema/SemaCoroutine.cpp
index 28386d4..22a1280 100644
--- a/clang/lib/Sema/SemaCoroutine.cpp
+++ b/clang/lib/Sema/SemaCoroutine.cpp
@@ -1,4 +1,4 @@
-//===--- SemaCoroutines.cpp - Semantic Analysis for Coroutines ------------===//
+//===-- SemaCoroutine.cpp - Semantic Analysis for Coroutines --------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.