ART bots can sometimes take up to 24h.

Set a timeout to 30h for some rare cases.

Change-Id: Ib0d0ad413532931e4fcf01eabaac896103ad1aaf
diff --git a/tools/luci/config/cr-buildbucket.cfg b/tools/luci/config/cr-buildbucket.cfg
index 8df8433..5ace19b 100644
--- a/tools/luci/config/cr-buildbucket.cfg
+++ b/tools/luci/config/cr-buildbucket.cfg
@@ -29,7 +29,7 @@
     builder_defaults {
       dimensions: "pool:luci.art.ci"
       service_account: "art-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
-      execution_timeout_secs: 10800  # 3h
+      execution_timeout_secs: 108000  # 30h
       swarming_tags: "vpython:native-python-wrapper"
       build_numbers: YES
       # Some builders require specific hardware, so we make the assignment in bots.cfg