/usr/ is in liblinphone-dev 3.3.2-4.1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/liblinphone-dev/
/usr/share/doc/liblinphone-dev/copyright
/usr/include/
/usr/include/linphone/
/usr/include/linphone/sipsetup.h
/usr/include/linphone/linphonecore.h
/usr/include/linphone/lpconfig.h
/usr/include/linphone/config.h
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/linphone.pc
/usr/share/doc/liblinphone-dev/BUGS
/usr/share/doc/liblinphone-dev/AUTHORS
/usr/share/doc/liblinphone-dev/NEWS.gz
/usr/share/doc/liblinphone-dev/README
/usr/share/doc/liblinphone-dev/TODO
/usr/share/doc/liblinphone-dev/changelog.Debian.gz
/usr/lib/liblinphone.so