Fix file header as it has been renamed.

llvm-svn: 15239
diff --git a/llvm/lib/Target/X86/X86PeepholeOpt.cpp b/llvm/lib/Target/X86/X86PeepholeOpt.cpp
index 8e3b831..82c622b 100644
--- a/llvm/lib/Target/X86/X86PeepholeOpt.cpp
+++ b/llvm/lib/Target/X86/X86PeepholeOpt.cpp
@@ -1,4 +1,4 @@
-//===-- PeepholeOptimizer.cpp - X86 Peephole Optimizer --------------------===//
+//===-- X86PeepholeOpt.cpp - X86 Peephole Optimizer -----------------------===//
 // 
 //                     The LLVM Compiler Infrastructure
 //