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

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 3c5aa4173f8666304fe183e9438503febe830059..c8d5f26d0dc6b3303623a9343a0cab8d69dd5405 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -837,7 +837,7 @@ void CodeGenerator::AssembleSwap(InstructionOperand* source,
       FPRegister dst = g.ToDoubleRegister(destination);
       __ Fmov(temp, src);
       __ Fmov(src, dst);
-      __ Fmov(src, temp);
+      __ Fmov(dst, temp);
     } else {
       DCHECK(destination->IsDoubleStackSlot());
       MemOperand dst = g.ToMemOperand(destination, masm());