Autobuild gets stuck due to interactive dialog when installing some package, a potential fix.

bitbucket-pipelines.yml

@@ -20,6 +20,7 @@ pipelines:
     scheduled:
     - step:
         script: # Modify the commands below to build your repository.
+          - DEBIAN_FRONTEND=noninteractive
           - mkdir -p build && cd build
           - apt-get update
           - apt-get install -y apt-transport-https ca-certificates gnupg software-properties-common wget