Update cord-macros to add remerge comment trigger

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I41bc036b5e5adae00b5bf7aca425513a52b07a7f
diff --git a/jjb/cord-macros.yaml b/jjb/cord-macros.yaml
index 9731559..3d3b295 100644
--- a/jjb/cord-macros.yaml
+++ b/jjb/cord-macros.yaml
@@ -250,6 +250,8 @@
           silent-start: true
           trigger-on:
             - change-merged-event
+            - comment-added-contains-event:
+                comment-contains-value: '(?i)^.*remerge$'
           projects:
             - project-compare-type: REG_EXP
               project-pattern: '{project-regexp}'