[Toybox] [PATCH] Implement "insmod -".

[enh]

Also use finit_module if available. Given that "insmod -" requires
init_module, maybe this isn't a worthwhile optimization. Given that
"insmod /actual/file.ko" is the common use case, maybe it is.

Fix a bug in readfileat where *plen would be corrupted if you didn't supply
your own buffer (because ibuf is 0 in that case, not a pointer to the start
of the allocated space).
---
 lib/lib.c           |  4 ++--
 toys/other/insmod.c | 32 ++++++++++++++++++--------------
 2 files changed, 20 insertions(+), 16 deletions(-)
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