Run DDC tests in the right mode with the migration test script.

Change-Id: I3af1a56d439acc3cfcb3c62fc27d9806da13ffc8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149342
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Commit-Queue: Bob Nystrom <rnystrom@google.com>

https://dart.googlesource.com/sdk/+/cbfb0bb92a7556b5dcc9b55486d688db9b3d72f7
diff --git a/commits.json b/commits.json
index cfc665f..8562e5c 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"c5d012900f7db0dc5dc9afb46f76d16b87915db0",
   "external/github.com/flutter/flutter":"eacd1c8de487a22d2158ee723283c67c45433d72",
-  "sdk":"107862e2bf84b10386c4e50f43a1e557ca54e77f"
+  "sdk":"cbfb0bb92a7556b5dcc9b55486d688db9b3d72f7"
 }
\ No newline at end of file