Allow pre-cq to submit infrastructure code.

BUG=chromium:799778
TEST=None

Change-Id: I2fba6ce1a3865fd340f64b778bf51af0a62596cd
Reviewed-on: https://chromium-review.googlesource.com/864884
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/COMMIT-QUEUE.ini b/COMMIT-QUEUE.ini
index 3d6c82e..cc555e5 100644
--- a/COMMIT-QUEUE.ini
+++ b/COMMIT-QUEUE.ini
@@ -10,3 +10,6 @@
 subsystem:all
 # Allow union of pre-cq configs from subdirectory
 union-pre-cq-sub-configs: yes
+# Some sub-configs enalbe submit-in-pre-cq, but we do not want that option to be
+# applied repo-wide.
+submit-in-pre-cq: no