/usr/lib/ is in libosmocore-dev 0.9.0-6.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/libosmovty.so
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libosmocodec.la
/usr/lib/x86_64-linux-gnu/libosmocore.la
/usr/lib/x86_64-linux-gnu/libosmoctrl.la
/usr/lib/x86_64-linux-gnu/libosmogb.la
/usr/lib/x86_64-linux-gnu/libosmogsm.la
/usr/lib/x86_64-linux-gnu/libosmosim.la
/usr/lib/x86_64-linux-gnu/libosmovty.la
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmocodec.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmocore.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmoctrl.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmogb.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmogsm.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libosmovty.pc
/usr/lib/x86_64-linux-gnu/libosmocodec.so
/usr/lib/x86_64-linux-gnu/libosmocore.so
/usr/lib/x86_64-linux-gnu/libosmoctrl.so
/usr/lib/x86_64-linux-gnu/libosmogb.so
/usr/lib/x86_64-linux-gnu/libosmogsm.so
/usr/lib/x86_64-linux-gnu/libosmosim.so