Add profile description

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/profile.h b/profile.h
index dbfb9c2..1185006 100644
--- a/profile.h
+++ b/profile.h
@@ -6,6 +6,7 @@
 struct profile_ops {
 	struct flist_head list;
 	char name[32];
+	char desc[64];
 	int flags;
 
 	/*