apparmor: add an optional profile attachment string for profiles

Add the ability to take in and report a human readable profile attachment
string for profiles so that attachment specifications can be easily
inspected.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>

diff --cc security/apparmor/apparmorfs.c
Simple merge

diff --cc security/apparmor/include/apparmorfs.h
Simple merge

diff --cc security/apparmor/include/policy.h
Simple merge

diff --cc security/apparmor/policy_unpack.c
Simple merge