update acme-tiny

diff --git a/acme-tiny b/acme-tiny
index cb094cf3efa34acef8c7139c8480e2135422e755..0a9afb2b72bafad29d172f9d3d704ef979530fe3 160000 (submodule)
--- a/acme-tiny
+++ b/acme-tiny
@@ -1 +1 @@
-Subproject commit cb094cf3efa34acef8c7139c8480e2135422e755
+Subproject commit 0a9afb2b72bafad29d172f9d3d704ef979530fe3