Rename to match other X86_64* names.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159196 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetObjectFile.h b/lib/Target/X86/X86TargetObjectFile.h
index 7698b59..2d320c5 100644
--- a/lib/Target/X86/X86TargetObjectFile.h
+++ b/lib/Target/X86/X86TargetObjectFile.h
@@ -16,9 +16,9 @@
 
 namespace llvm {
 
-  /// X8664_MachoTargetObjectFile - This TLOF implementation is used for Darwin
+  /// X86_64MachoTargetObjectFile - This TLOF implementation is used for Darwin
   /// x86-64.
-  class X8664_MachoTargetObjectFile : public TargetLoweringObjectFileMachO {
+  class X86_64MachoTargetObjectFile : public TargetLoweringObjectFileMachO {
   public:
     virtual const MCExpr *
     getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,