[Toybox] [PATCH] gpiod: fix foreach_chip crashes.

[enh]

This was segfaulting because the loop copying the chips into the array
was corrupting the list, and because the llist_traverse was being given
the wrong pointer.

The strdup wasn't failing, but should be an xstrdup anyway. (I think
all the strdups in toys/ should actually be xstrdups. Maybe we should
even poison strdup, or just `#define strdup xstrdup`?)
---
 toys/other/gpiod.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
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