Add debug line to self-signer check.

Author: jmcarp

build/self-signer-utility.sh

@@ -8,4 +8,5 @@ lastCommit=$(git rev-parse @~)
 git diff "${lastCommit}" "${currentCommit}" cockroachdb/values.yaml | grep -w "$tag" | grep +
 if [[ $? -eq 0 ]]; then
   echo "You have changed the tag of selfSigner utility"
+  git diff "${lastCommit}" "${currentCommit}" cockroachdb/values.yaml
 fi