/usr/include/ is in libmircore-dev 0.31.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/mircore/
/usr/include/mircore/mir/
/usr/include/mircore/mir/abnormal_exit.h
/usr/include/mircore/mir/anonymous_shm_file.h
/usr/include/mircore/mir/fatal.h
/usr/include/mircore/mir/fd.h
/usr/include/mircore/mir/geometry/
/usr/include/mircore/mir/geometry/dimensions.h
/usr/include/mircore/mir/geometry/displacement.h
/usr/include/mircore/mir/geometry/forward.h
/usr/include/mircore/mir/geometry/length.h
/usr/include/mircore/mir/geometry/point.h
/usr/include/mircore/mir/geometry/rectangle.h
/usr/include/mircore/mir/geometry/rectangles.h
/usr/include/mircore/mir/geometry/size.h
/usr/include/mircore/mir/int_wrapper.h
/usr/include/mircore/mir/optional_value.h
/usr/include/mircore/mir/shm_file.h
/usr/include/mircore/mir_toolkit/
/usr/include/mircore/mir_toolkit/common.h
/usr/include/mircore/mir_toolkit/deprecations.h
/usr/include/mircore/mir_toolkit/mir_input_device_types.h
/usr/include/mircore/mir_toolkit/mir_native_buffer.h
/usr/include/mircore/mir_toolkit/mir_version_number.h