[led] Roll led.

TBR=dnj@chromium.org, nodir@chromium.org

Bug:
Change-Id: I4f1dada9e4aa395e796c93a0a54e0b6899ac6597
Reviewed-on: https://chromium-review.googlesource.com/517235Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

cipd_manifest.txt

@@ -6,4 +6,4 @@
 infra/tools/luci/vpython/${platform}  git_revision:00f5394a90dfa98e53e191d5a6b543bce70c295f
 
 # LUCI editor
-infra/tools/luci/led/${platform}  git_revision:9b7d182a2118e215514087db4dab65204fe981e5
+infra/tools/luci/led/${platform}  git_revision:712c596d2a593eb976d2bd202aee3e580990d3f5