misra-docker-images/builders.sh: Clearly separate building different images

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I09ec1a1c740d5ba236cb52f254e976a7963001bc
diff --git a/misra-docker-images/builders.sh b/misra-docker-images/builders.sh
index bf31964..396e62c 100644
--- a/misra-docker-images/builders.sh
+++ b/misra-docker-images/builders.sh
@@ -28,6 +28,7 @@
     test -d $image  && test -f $image/build.sh && \
     (
         set -ex
+        echo "============================"
         echo "Building image: misra:${tag}"
         cd $image
         ./build.sh