Make apertis-abi-compare returning the same value as abi-compliance-checker

This value will be used to determine if the job should fail or succeed. Currently, if an ABI break is detected during the job from infrastructure/ci-package-builder!237 (merged), this job will succeed. It is annoying because pkg maintainers won't be notified about a breakage.

https://phabricator.apertis.org/T8626

Signed-off-by: Dylan Aïssi dylan.aissi@collabora.com