Update 'sweep' submodule

diff --git a/sweep b/sweep
index 1553d9392686b6827ffcc6c870635a19a2818863..9a3f09fc02c0ce5699f9224b2c7935fddb0360fd 160000 (submodule)
--- a/sweep
+++ b/sweep
@@ -1 +1 @@
-Subproject commit 1553d9392686b6827ffcc6c870635a19a2818863
+Subproject commit 9a3f09fc02c0ce5699f9224b2c7935fddb0360fd