[infra] Increase linux-chromeos-rel build timeout from 3 to 4 hours

Bug: 1121834
Change-Id: Ic98a994d225795788e10c4b161f9de1b1bde60d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2376572
Auto-Submit: Gregory Guterman <guterman@google.com>
Reviewed-by: Erik Staab <estaab@chromium.org>
Commit-Queue: Erik Staab <estaab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801637}

infra/config/generated/cr-buildbucket.cfg

@@ -10458,7 +10458,7 @@ buckets {
         cmd: "recipes"
       }
       properties: "{\"$build/chromium_tests\":{\"bucketed_triggers\":true},\"$build/goma\":{\"enable_ats\":true,\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"},\"$kitchen\":{\"devshell\":true,\"git_auth\":true},\"mastername\":\"chromium.chromiumos\",\"recipe\":\"chromium\"}"
-      execution_timeout_secs: 10800
+      execution_timeout_secs: 14400
       build_numbers: YES
       service_account: "chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
       resultdb {

infra/config/subprojects/chromium/ci.star

@@ -624,6 +624,7 @@ ci.chromiumos_builder(
         short_name = "rel",
     ),
     main_console_view = settings.main_console_name,
+    execution_timeout = 4 * time.hour,
 )
 
 ci.chromiumos_builder(