[led] Reland: Update led to the latest version.

Now using a version that's actually uploaded to cipd (and verified with
PRESUBMIT).

infra.git relevant Changelog:
8bc0df738 [kitchen] Remove some unnecessary flags.
54472fa9f led: improvements in led get-build subcommand.
6707984c0 [led] Add ability to set buildbucket tags on get-builder command.

R=nodir@chromium.org, vadimsh@chromium.org

Bug:
Change-Id: I1927c19097d6a6057c48ddbaa185368cc3520ac3
Reviewed-on: https://chromium-review.googlesource.com/813089
Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

cipd_manifest.txt

@@ -11,7 +11,7 @@ $VerifiedPlatform windows-386 windows-amd64
 infra/tools/luci/vpython/${platform}  git_revision:a3d636052088db3daa48413b3e209eed4f5cb4ad
 
 # LUCI editor
-infra/tools/luci/led/${platform}  git_revision:9010ba713ba6fc9982c412161150a5cd70d5b623
+infra/tools/luci/led/${platform}  git_revision:54b6b3102fbb15ca3e3bd762ff3df7b08057d653
 
 # Mac toolchain installer
 infra/tools/mac_toolchain/${os=mac}-${arch} git_revision:2b69be6203f56a970202d9b5984557c0453b4eb0