Make archive bot runable with smaller timeout

This only takes a short time, so run on the bots we can't use for anything else.

Bug: 124643718
Change-Id: I136009d4f68a1618162145925dcdb18f937080f1
diff --git a/infra/config/global/cr-buildbucket.cfg b/infra/config/global/cr-buildbucket.cfg
index 0136562..863bbbe 100644
--- a/infra/config/global/cr-buildbucket.cfg
+++ b/infra/config/global/cr-buildbucket.cfg
@@ -86,6 +86,7 @@
     builders {
       name: "archive"
       mixins: "linux"
+      execution_timeout_secs: 1800  # 1/2h
       recipe {
         properties: "archive:True"
       }
@@ -93,6 +94,7 @@
     builders {
       name: "archive_release"
       mixins: "linux"
+      execution_timeout_secs: 1800  # 1/2h
       recipe {
         # TODO(ricow): set archive flag when we flip over
         # properties: "archive:True"