coll/hardening-info: Do another F-P -> F-N trade off

Consider memmove and memset to the "always safe" like "memcpy".  This
is (another) false-positive -> false-negative trade-off for reducing
the number of false-positives with hardening-no-fortify-functions.

Signed-off-by: Niels Thykier <niels@thykier.net>