Update 'sweep' submodule

diff --git a/sweep b/sweep
index 82b5e31aa3b742bfac1eba7b9995904f2b905f4e..2603c88e4556aab8e94be704aa621cd0e3390ebf 160000 (submodule)
--- a/sweep
+++ b/sweep
@@ -1 +1 @@
-Subproject commit 82b5e31aa3b742bfac1eba7b9995904f2b905f4e
+Subproject commit 2603c88e4556aab8e94be704aa621cd0e3390ebf