Update 'sweep' submodule

diff --git a/sweep b/sweep
index 526c1fae14f28cf2a7741bbe008bfac04db6281d..acb57675b5903778e2f740c624f04f7de4a7d0f0 160000 (submodule)
--- a/sweep
+++ b/sweep
@@ -1 +1 @@
-Subproject commit 526c1fae14f28cf2a7741bbe008bfac04db6281d
+Subproject commit acb57675b5903778e2f740c624f04f7de4a7d0f0