update multibuild to latest devel

mattip · mattip · commit f0adc3731472 · 2021-07-11T12:29:05.000+03:00
diff --git a/multibuild b/multibuild
@@ -1 +1 @@
-Subproject commit 04e209bc00b34f5c5d88d06fd547ab3eaf990a87
+Subproject commit 7684e52bcb023d511c4f17b638d497203f218a68
