Incorrect format string in default_resolve_host

[fakkeroni]

aws trying to log
host_name->bytes
in
AWS_LOGF_DEBUG(AWS_LS_IO_DNS, "id=%p: Host resolution requested for %s", (void *)resolver, host_name->bytes);
the matching format string parameter is "%s", however host_name->bytes is of type:
const uint8_t bytes[1];
which is generally not null terminated.

[bretambrose]

A byte array in general, sure, but the bytes off the end of aws_string are always null terminated.