Fix ABI check job in GitLab CI
Since the reference BIND version for the ABI check job which is run for the main branch is now 9.17.2, autoreconf needs to be run before ./configure as the latter is no longer present in the Git repository.
Since the reference BIND version for the ABI check job which is run for the main branch is now 9.17.2, autoreconf needs to be run before ./configure as the latter is no longer present in the Git repository.