Updates utils-x11: 7b2fb7a Sleep before turning screen off at xlock

diff --git a/utils-x11 b/utils-x11
index 02195d4da406adb7d9b683afe690d4376dc9fac5..7b2fb7a022a3273177eefcd68f67c4a7bc3edbbb 160000 (submodule)
--- a/utils-x11
+++ b/utils-x11
@@ -1 +1 @@
-Subproject commit 02195d4da406adb7d9b683afe690d4376dc9fac5
+Subproject commit 7b2fb7a022a3273177eefcd68f67c4a7bc3edbbb