Rename AssemblerX86 to AssemblerX8632 so it works with SZTargets.def.

src/IceTargetLoweringX8632.h

Index: src/IceTargetLoweringX8632.h
diff --git a/src/IceTargetLoweringX8632.h b/src/IceTargetLoweringX8632.h
index 286e380ae2734c329eda9c368e5a356ea037ebcb..34f187c61735736b92248e119fd3aeae1a0a38f3 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -67,7 +67,7 @@ public:
                               size_t BasicFrameOffset, size_t &InArgsSizeBytes);
   Operand *loOperand(Operand *Operand);
   Operand *hiOperand(Operand *Operand);
-  x86::Address stackVarToAsmOperand(const Variable *Var) const;
+  X8632::Address stackVarToAsmOperand(const Variable *Var) const;
 
   enum X86InstructionSet {
     Begin,