[led] Roll led to latest version.

infra.git: git log --oneline d1e9a52..e6c2ae3 ./go/src/infra/tools/led
e6c2ae3a0 led: Don't ignore task service account.
a06566faa [led] Accept new gerrit patchset URL format.

R=tandrii@chromium.org

Bug: 784763
Change-Id: I0cb12f58f4a71847188b52c70559aed07cd17d8e
Reviewed-on: https://chromium-review.googlesource.com/768349
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@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/${platform}  git_revision:d1e9a52e1c8414cd0a0df8bec6c37f325e0fbaa1
+infra/tools/luci/led/${platform}  git_revision:e6c2ae3a0a56b33ae5426c04b1f3412fe853d214
 
 # Mac toolchain installer
 infra/tools/mac_toolchain/${os=mac}-${arch} git_revision:7eb9e7d8efe8bfec749e364470c5e7a7260c9ac2