gitlab-ci: Bring ARM docker image install script in line with x86_64

Use https:// URLs in the APT configuration.

Drop --no-install-recommends, the image generation template disables
installation of recommended packages in /etc/apt/apt.conf.

Run apt-get autoremove at the end, cleaning up packages which were
installed to satisfy dependencies but are no longer needed.

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

.gitlab-ci/debian-test-install.sh

@@ -4,9 +4,10 @@ set -e
 set -o xtrace
 
 ############### Install packages for building
-apt-get update
 apt-get -y install ca-certificates
-apt-get -y install --no-install-recommends \
+sed -i -e 's/http:\/\/deb/https:\/\/deb/g' /etc/apt/sources.list
+apt-get update
+apt-get -y install \
 	bc \
 	bison \
 	bzip2 \
@@ -102,3 +103,5 @@ apt-get purge -y \
         gcc \
         git \
         ninja-build
+
+apt-get autoremove -y --purge