some comment fix for X86 and ARM

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150902 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86COFFMachineModuleInfo.h b/lib/Target/X86/X86COFFMachineModuleInfo.h
index f7c6dd1..63c08f1 100644
--- a/lib/Target/X86/X86COFFMachineModuleInfo.h
+++ b/lib/Target/X86/X86COFFMachineModuleInfo.h
@@ -1,4 +1,4 @@
-//===-- X86COFFMachineModuleInfo.h ------------------------------*- C++ -*-===//
+//===-- X86COFFMachineModuleInfo.h - X86 COFF MMI Impl ----------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //