[Issue 16398] aligned allocator: add aligned reallocation for Posix

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=16398

Basile B. <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
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            Summary|aligned allocator: aligned  |aligned allocator: add
                   |reallocation is not defined |aligned reallocation for
                   |                            |Posix

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