Fix file header as it has been renamed.

llvm-svn: 15239
diff --git a/llvm/lib/Target/X86/X86ISelSimple.cpp b/llvm/lib/Target/X86/X86ISelSimple.cpp
index 4b43896..3f71a97 100644
--- a/llvm/lib/Target/X86/X86ISelSimple.cpp
+++ b/llvm/lib/Target/X86/X86ISelSimple.cpp
@@ -1,4 +1,4 @@
-//===-- InstSelectSimple.cpp - A simple instruction selector for x86 ------===//
+//===-- X86ISelSimple.cpp - A simple instruction selector for x86 ---------===//
 // 
 //                     The LLVM Compiler Infrastructure
 //