/usr/lib/ada/ is in libgnadecommon2-dev 1.6.2-9.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ada/adalib/
/usr/lib/ada/adalib/gnadecommon/
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-list-strings.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-list.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-number_list.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-string_builder.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-string_tables.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-string_vectors.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-tables.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-wide_string_tables.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support-wide_string_vectors.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-support.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db-version.ali
/usr/lib/ada/adalib/gnadecommon/gnu-db.ali
/usr/lib/ada/adalib/gnadecommon/gnu.ali