Force trybots to compile when modifying mb files.

Change-Id: I533a7b6727ebefa6a2dc2433e2586579f9e17631
Bug: None
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/407044
Commit-Queue: Jeremy Leconte <jleconte@google.com>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#45519}
diff --git a/infra/specs/trybot_analyze_config.json b/infra/specs/trybot_analyze_config.json
index 2c818d4..efd5484 100644
--- a/infra/specs/trybot_analyze_config.json
+++ b/infra/specs/trybot_analyze_config.json
@@ -1,10 +1,11 @@
 {
   "base": {
       "exclusions": [
-          ".vpython",
           ".vpython3",
           "DEPS",
-          "infra/specs/.*"
+          "infra/specs/.*",
+          "tools_webrtc/mb/mb_config.pyl",
+          "tools_webrtc/mb/mb.py"
       ]
   }
 }