Increase timeout for "Libfuzzer Upload Linux UBSan" to 4 hours.

The builder is frequently timing out due to variance in build times,
this should give it sufficient headroom.

Change-Id: Ifea4b7df61b2961d6f097f44397855b8c23900e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2533195
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826814}

infra/config/generated/cr-buildbucket.cfg

@@ -4954,7 +4954,7 @@ buckets {
         cmd: "recipes"
       }
       properties: "{\"$build/goma\":{\"enable_ats\":true,\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\",\"use_luci_auth\":true},\"$kitchen\":{\"devshell\":true,\"git_auth\":true},\"$recipe_engine/isolated\":{\"server\":\"https://isolateserver.appspot.com\"},\"builder_group\":\"chromium.fuzz\",\"recipe\":\"chromium_libfuzzer\"}"
-      execution_timeout_secs: 12600
+      execution_timeout_secs: 14400
       build_numbers: YES
       service_account: "chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
       experiments {

infra/config/subprojects/chromium/ci.star

@@ -2212,7 +2212,7 @@ ci.fuzz_libfuzzer_builder(
         category = "libfuzz",
         short_name = "linux-ubsan",
     ),
-    execution_timeout = 3 * time.hour + 30 * time.minute,
+    execution_timeout = 4 * time.hour,
     triggering_policy = scheduler.greedy_batching(
         max_concurrent_invocations = 5,
     ),