Revert "[alt-builder] Revert to stable gcc"

This reverts commit f8d537d7
2 jobs from master in 4 minutes and 56 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Deploy
passed #153314
deploy:alt-builder

00:04:56

failed #153315
deploy:repository/aptly

00:00:44

 
Name Stage Failure
failed
deploy:repository/aptly Deploy
Setting up gpg-wks-client (2.2.12-1+deb10u1) ...
Setting up gnupg (2.2.12-1+deb10u1) ...
Setting up gnupg2 (2.2.12-1+deb10u1) ...
Processing triggers for libc-bin (2.28-10) ...
Warning: apt-key output should not be parsed (stdout is not a terminal)
Executing: /tmp/apt-key-gpghome.4Gz0UxRfLg/gpg.1.sh --keyserver pool.sks-keyservers.net --recv-keys ED75B5A4483DA07C
gpg: keyserver receive failed: Cannot assign requested address
The command '/bin/sh -c apt-get update && apt-get install -y gnupg2 && apt-key adv --keyserver pool.sks-keyservers.net --recv-keys ED75B5A4483DA07C && echo "deb http://repo.aptly.info/ squeeze main" >> /etc/apt/sources.list && apt-get update && apt-get install -y aptly=1.4.0 gnupg2 && rm -fr /var/lib/apt/lists/*' returned a non-zero code: 2
ERROR: Job failed: exit code 2