[ensure] Update lucicfg.

This new version contains the -fail-on-warnings flag, which I want.

Bug: INTK-296 #comment
Change-Id: If3aad84247de07f20e765662f87b3da274fe79b2
diff --git a/cipd.ensure b/cipd.ensure
index 2de8116..8ddc46c 100644
--- a/cipd.ensure
+++ b/cipd.ensure
@@ -30,7 +30,7 @@
 infra/tools/luci/logdog/logdog/${platform} git_revision:2237a617181dbfcee8b37f94a5b7d834f0f69fb0
 
 # Lucicfg tool
-infra/tools/luci/lucicfg/${platform}  git_revision:945172c134b5bfd42d4ac5edce3cb681d26dc75f
+infra/tools/luci/lucicfg/${platform}  git_revision:cbdbe56177e03680b77d0ac8e863d035ee8ad95f
 
 # vpython
 infra/tools/luci/vpython/${platform} git_revision:2237a617181dbfcee8b37f94a5b7d834f0f69fb0