Add change-message plugin checker

Change-Id: Ia9dc97c5569428d6ed60e15672e8b1402be484ed
diff --git a/checkers.yaml b/checkers.yaml
index 966555a..a28f941 100644
--- a/checkers.yaml
+++ b/checkers.yaml
@@ -101,6 +101,11 @@
     name: "Zuul Check Pipeline"
     description: "Run Zuul jobs on new patchsets"
 
+  - uuid: "zuul-check:plugins_changemessage"
+    repository: "plugins/changemessage"
+    name: "Zuul Check Pipeline"
+    description: "Run Zuul jobs on new patchsets"
+
   - uuid: "zuul-check:plugins_code-owners"
     repository: "plugins/code-owners"
     name: "Zuul Check Pipeline"
diff --git a/zuul/main.yaml b/zuul/main.yaml
index 1c7d9a3..6d61bb2 100644
--- a/zuul/main.yaml
+++ b/zuul/main.yaml
@@ -32,6 +32,7 @@
           # All of the rest of the projects, alphabetically sorted.
           - plugins/admin-console
           - plugins/batch
+          - plugins/changemessage
           - plugins/checks
           - plugins/code-owners
           - plugins/lfs