[6.0] f53736b31 Use SML_AllocBuf with -smalloc

[Dridi Boukelmoune]

commit f53736b314f613aeb78f740571f949fe9956044d
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Tue Jun 22 11:48:58 2021 +0200

    Use SML_AllocBuf with -smalloc

diff --git a/bin/varnishd/storage/storage_malloc.c b/bin/varnishd/storage/storage_malloc.c
index b8a168af8..835f230a5 100644
--- a/bin/varnishd/storage/storage_malloc.c
+++ b/bin/varnishd/storage/storage_malloc.c
@@ -230,4 +230,6 @@ const struct stevedore sma_stevedore = {
 	.methods	=	&SML_methods,
 	.var_free_space =	sma_free_space,
 	.var_used_space =	sma_used_space,
+	.allocbuf	=	SML_AllocBuf,
+	.freebuf	=	SML_FreeBuf,
 };