Update timeout for internal bot

Change-Id: Ic4d87fef403943df440bfdd5c392537849ea7e9a
diff --git a/infra/config/global/cr-buildbucket.cfg b/infra/config/global/cr-buildbucket.cfg
index 7bcba6a..d13ffb0 100644
--- a/infra/config/global/cr-buildbucket.cfg
+++ b/infra/config/global/cr-buildbucket.cfg
@@ -326,6 +326,7 @@
       name: "linux-internal"
       mixins: "linux"
       mixins: "internal"
+      execution_timeout_secs: 43200  # 12h
       recipe {
         properties: "internal:True"
       }
@@ -334,6 +335,7 @@
       name: "linux-internal_release"
       mixins: "linux"
       mixins: "internal"
+      execution_timeout_secs: 43200  # 12h
       recipe {
         properties: "internal:True"
       }