/usr/lib/x86_64-linux-gnu/ada/ is in libxmlada-sax7-dev 17.1.2017-5.
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/xmlada_sax/
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-attributes.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-encodings.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-exceptions.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-htable.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-locators.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-models.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-pointers.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-readers.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-state_machines.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-symbols.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax-utils.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/xmlada_sax/sax.ali