X64: Fix bug in minus-zero check after int32 multiplication.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
===================================================================
--- src/x64/lithium-codegen-x64.cc	(revision 10599)
+++ src/x64/lithium-codegen-x64.cc	(working copy)
@@ -993,11 +993,11 @@
         DeoptimizeIf(no_condition, instr->environment());
       }
     } else if (right->IsStackSlot()) {
-      __ or_(kScratchRegister, ToOperand(right));
+      __ orl(kScratchRegister, ToOperand(right));
       DeoptimizeIf(sign, instr->environment());
     } else {
       // Test the non-zero operand for negative sign.
-      __ or_(kScratchRegister, ToRegister(right));
+      __ orl(kScratchRegister, ToRegister(right));
       DeoptimizeIf(sign, instr->environment());
     }
     __ bind(&done);