[turbofan] Fix double register swap in ARM and ARM64 backends.

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index d6635903204f7e9f3309de39ef14867fe9d31aa5..656abb44f4fd205065830f5e8c64cdc8745c6464 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -819,7 +819,7 @@ void CodeGenerator::AssembleSwap(InstructionOperand* source,
       DwVfpRegister dst = g.ToDoubleRegister(destination);
       __ Move(temp, src);
       __ Move(src, dst);
-      __ Move(src, temp);
+      __ Move(dst, temp);
     } else {
       DCHECK(destination->IsDoubleStackSlot());
       MemOperand dst = g.ToMemOperand(destination);