Add mmap region descriptions to permissive mode logs

[ayrtonm]

Permissive mode currently prints the state of /proc/self/maps when the process is terminating. This technically includes everything but it's hard to tell which memory regions correspond to the stacks and TLS so we should add this information explicitly.

[ayrtonm]

We don't mmap TLS ourselves but we do pkey_mprotect it so we could queue it up for logging there.