/usr/lib/x86_64-linux-gnu/ada/ is in libgpr1-dev 2017-5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/ada/adalib/
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-ali.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-attr-pm.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-attr.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-com.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-compilation-process-waiter.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-compilation-process.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-compilation-protocol.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-compilation-slave.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-compilation-sync.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-compilation.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-conf.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-cset.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-debug.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-dect.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-env.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-err.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-erroutc.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-ext.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-knowledge.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-names.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-nmsc.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-opt.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-osint.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-output.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-part.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-pp.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-proc.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-scans.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-script.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-sdefault.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-sinput.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-snames.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-strt.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-tempdir.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-tree.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-util-aux.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-util.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr-version.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/gpr/gpr_build_util.ali