apparmor: add the ability to report a sha1 hash of loaded policy

Provide userspace the ability to introspect a sha1 hash value for each
profile currently loaded.

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

security/apparmor/include/policy.h

@@ -219,6 +219,7 @@ struct aa_profile {
 	struct aa_caps caps;
 	struct aa_rlimit rlimits;
 
+	unsigned char *hash;
 	char *dirname;
 	struct dentry *dents[AAFS_PROF_SIZEOF];
 };