core: Add AppArmor profile switching

This permit to switch to a specific apparmor profile when starting a daemon. This
will result in a non operation if apparmor is disabled.
It also add a new build requirement on libapparmor for using this feature.

src/shared/exit-status.c

@@ -136,6 +136,9 @@ const char* exit_status_to_string(ExitStatus status, ExitStatusLevel level) {
 
                 case EXIT_PERSONALITY:
                         return "PERSONALITY";
+
+                case EXIT_APPARMOR_PROFILE:
+                        return "APPARMOR";
                 }
         }
 

src/shared/exit-status.h

@@ -69,7 +69,8 @@ typedef enum ExitStatus {
         EXIT_NO_NEW_PRIVILEGES,
         EXIT_SECCOMP,
         EXIT_SELINUX_CONTEXT,
-        EXIT_PERSONALITY  /* 230 */
+        EXIT_PERSONALITY,  /* 230 */
+        EXIT_APPARMOR_PROFILE
 } ExitStatus;
 
 typedef enum ExitStatusLevel {