Bug 1464002 - Implementation error of Atomics.compareExchange on mips. r=lth

--HG--
extra : rebase_source : cc5e9c8f507d0e6af6f2933f4591a6c6aa7766bc

js/src/jit/mips-shared/MacroAssembler-mips-shared.cpp

@@ -2673,7 +2673,7 @@ CompareExchangeJS(MacroAssembler& masm, Scalar::Type arrayType, const Synchroniz
                              temp);
         masm.convertUInt32ToDouble(temp, output.fpu());
     } else {
-        masm.compareExchange(arrayType, sync, mem, oldval, newval, valueTemp, maskTemp, temp,
+        masm.compareExchange(arrayType, sync, mem, oldval, newval, valueTemp, offsetTemp, maskTemp,
                              output.gpr());
     }
 }