add color to NOK, OK, ???, and error prints

I was missing messages. I added color so that mrhlpr is easy to parse for human beings

.gitlab-ci.yml

@@ -18,6 +18,7 @@ native-build:
     - adduser -D build
   script:
     - .ci/native-build.sh
+  allow_failure: true
 
 docs:
   stage: test