Updates utils-x11: b5671af Restore window focus at xlock

diff --git a/utils-x11 b/utils-x11
index 7aabcfcda3aabdbee2dcad04c657a67f6cd5bd19..b5671afebb3a90405b0fa4829e0fe654a4697928 160000 (submodule)
--- a/utils-x11
+++ b/utils-x11
@@ -1 +1 @@
-Subproject commit 7aabcfcda3aabdbee2dcad04c657a67f6cd5bd19
+Subproject commit b5671afebb3a90405b0fa4829e0fe654a4697928