Replace OS::MemCopy with OS::MemMove (just as fast but more flexible).

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index c01390c4aa878c165b3c3299f1e3ad37f7d4451a..88a947317f8d2e2dff2a4624b4ddbeadf42c2db9 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -14083,7 +14083,7 @@ Handle<DeclaredAccessorDescriptor> DeclaredAccessorDescriptor::Create(
     if (previous_length != 0) {
       uint8_t* previous_array =
           previous->serialized_data()->GetDataStartAddress();
-      memcpy(array, previous_array, previous_length);
+      OS::MemCopy(array, previous_array, previous_length);
       array += previous_length;
     }
     ASSERT(reinterpret_cast<uintptr_t>(array) % sizeof(uintptr_t) == 0);