parser: convert the stored audit from a bit mask to a bool

This delays the convertion of the audit flag until passing to the
backend. This is a step towards fix the parser front end so that it
doesn't use encoded permission mappings.

Note: the patch embedds the bool conversion into a struct to ensure
the compiler will fail to build unless every use is fixed. The
struct is removed in the following patch.

Signed-off-by: John Johansen <john.johansen@canonical.com>

parser/parser.h

@@ -130,7 +130,7 @@ struct cod_entry {
 	Profile *prof;		 	/* Special profile defined
 					 * just for this executable */
 	perms_t perms;			/* perms is 'or' of AA_* bits */
-	int audit;			/* audit flags for perms */
+  struct { bool audit; } audit;			/* audit flags for perms */
 	int deny;			/* TRUE or FALSE */
 
 	int alias_ignore;		/* ignore for alias processing */