Fix file header comment

llvm-svn: 28441
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 2344d01..fc60277 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1,4 +1,4 @@
-//===-- X86ISelLowering.h - X86 DAG Lowering Interface ----------*- C++ -*-===//
+//===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //