DCHECK(IsAligned(addr, alignof(T))) is false on s390 debug simulator test
 case. So copy to an aligned buffer and we can relocate the serialized code.

Change-Id: I8e4ad9ff25fd9a9e5478831250ff741c3e72a86f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1822860Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Reviewed-by: Clemens Backes [né Hammacher] <clemensb@chromium.org>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#63990}