autotest: Also whitelist skylab_drone for cloudsql access

BUG=chromium:868128
TEST=None

Change-Id: Ibe4f6075bc3b626fcca50c07f0f808277e9e25b2
Reviewed-on: https://chromium-review.googlesource.com/1152562
Commit-Ready: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/site_utils/sync_cloudsql_access.py b/site_utils/sync_cloudsql_access.py
index b9762b3..85a0fe6 100755
--- a/site_utils/sync_cloudsql_access.py
+++ b/site_utils/sync_cloudsql_access.py
@@ -41,6 +41,7 @@
         'scheduler',
         'sentinel',
         'shard',
+        'skylab_drone',
 }