[PATCH] stdlib: Support malloc-managed environ arrays for compatibility

[Florian Weimer]

* H. J. Lu:

> On x32, I got
>
> [hjl@gnu-tgl-3 glibc-x32-cet]$ env -i
> LOCPATH=/export/build/gnu/tools-build/glibc-x32-cet/build-x86_64-linux/localedata/
> LC_CTYPE=de_DE.UTF-8
> /export/build/gnu/tools-build/glibc-x32-cet/build-x86_64-linux/localedata/bug-setlocale1
> realloc(): invalid pointer
> Aborted (core dumped)
> [hjl@gnu-tgl-3 glibc-x32-cet]$

What's the host glibc?  I expect it's env -i that's crashing because
localedata/bug-setlocale1 uses the test skeleton, and the wrapper
process would report the crash differently.

Thanks,
Florian