/usr/include/jreen-qt5/ is in libjreen-qt5-dev 1.2.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/jreen-qt5/jreen/
/usr/include/jreen-qt5/jreen/abstractroster.h
/usr/include/jreen-qt5/jreen/activity.h
/usr/include/jreen-qt5/jreen/attention.h
/usr/include/jreen-qt5/jreen/bitsofbinary.h
/usr/include/jreen-qt5/jreen/bookmark.h
/usr/include/jreen-qt5/jreen/bookmarkstorage.h
/usr/include/jreen-qt5/jreen/buffereddatastream.h
/usr/include/jreen-qt5/jreen/capabilities.h
/usr/include/jreen-qt5/jreen/captcha.h
/usr/include/jreen-qt5/jreen/chatstate.h
/usr/include/jreen-qt5/jreen/client.h
/usr/include/jreen-qt5/jreen/connection.h
/usr/include/jreen-qt5/jreen/connectionbosh.h
/usr/include/jreen-qt5/jreen/dataform.h
/usr/include/jreen-qt5/jreen/datastream.h
/usr/include/jreen-qt5/jreen/delayeddelivery.h
/usr/include/jreen-qt5/jreen/directconnection.h
/usr/include/jreen-qt5/jreen/disco.h
/usr/include/jreen-qt5/jreen/entitytime.h
/usr/include/jreen-qt5/jreen/error.h
/usr/include/jreen-qt5/jreen/experimental/
/usr/include/jreen-qt5/jreen/experimental/iristransport.h
/usr/include/jreen-qt5/jreen/experimental/jingleaudiocontent.h
/usr/include/jreen-qt5/jreen/experimental/jingleaudiopayload.h
/usr/include/jreen-qt5/jreen/experimental/jinglecontent.h
/usr/include/jreen-qt5/jreen/experimental/jinglemanager.h
/usr/include/jreen-qt5/jreen/experimental/jinglesession.h
/usr/include/jreen-qt5/jreen/experimental/jingletransport.h
/usr/include/jreen-qt5/jreen/forwarded.h
/usr/include/jreen-qt5/jreen/iq.h
/usr/include/jreen-qt5/jreen/iqreply.h
/usr/include/jreen-qt5/jreen/jid.h
/usr/include/jreen-qt5/jreen/jreen.h
/usr/include/jreen-qt5/jreen/jstrings.h
/usr/include/jreen-qt5/jreen/langmap.h
/usr/include/jreen-qt5/jreen/logger.h
/usr/include/jreen-qt5/jreen/message.h
/usr/include/jreen-qt5/jreen/messagesession.h
/usr/include/jreen-qt5/jreen/metacontactstorage.h
/usr/include/jreen-qt5/jreen/mood.h
/usr/include/jreen-qt5/jreen/mucroom.h
/usr/include/jreen-qt5/jreen/nickname.h
/usr/include/jreen-qt5/jreen/parser.h
/usr/include/jreen-qt5/jreen/pgpencrypted.h
/usr/include/jreen-qt5/jreen/pgpsigned.h
/usr/include/jreen-qt5/jreen/ping.h
/usr/include/jreen-qt5/jreen/presence.h
/usr/include/jreen-qt5/jreen/privacymanager.h
/usr/include/jreen-qt5/jreen/privatexml.h
/usr/include/jreen-qt5/jreen/pubsubevent.h
/usr/include/jreen-qt5/jreen/pubsubmanager.h
/usr/include/jreen-qt5/jreen/receipt.h
/usr/include/jreen-qt5/jreen/registrationmanager.h
/usr/include/jreen-qt5/jreen/softwareversion.h
/usr/include/jreen-qt5/jreen/stanza.h
/usr/include/jreen-qt5/jreen/stanzaextension.h
/usr/include/jreen-qt5/jreen/streamprocessor.h
/usr/include/jreen-qt5/jreen/subscription.h
/usr/include/jreen-qt5/jreen/tcpconnection.h
/usr/include/jreen-qt5/jreen/tune.h
/usr/include/jreen-qt5/jreen/udpconnection.h
/usr/include/jreen-qt5/jreen/util.h
/usr/include/jreen-qt5/jreen/vcard.h
/usr/include/jreen-qt5/jreen/vcardmanager.h
/usr/include/jreen-qt5/jreen/vcardupdate.h