capabilities: add descriptions for AUDIT_CONTROL and AUDIT_WRITE

Fill in missing descriptions for AUDIT_CONTROL and AUDIT_WRITE definitions.
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>

include/uapi/linux/capability.h

@@ -308,8 +308,12 @@ struct vfs_cap_data {
 
 #define CAP_LEASE            28
 
+/* Allow writing the audit log via unicast netlink socket */
+
 #define CAP_AUDIT_WRITE      29
 
+/* Allow configuration of audit via unicast netlink socket */
+
 #define CAP_AUDIT_CONTROL    30
 
 #define CAP_SETFCAP	     31