/usr/include/semanage/ is in libsemanage1-dev 2.6-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/semanage/boolean_record.h
/usr/include/semanage/booleans_active.h
/usr/include/semanage/booleans_local.h
/usr/include/semanage/booleans_policy.h
/usr/include/semanage/context_record.h
/usr/include/semanage/debug.h
/usr/include/semanage/fcontext_record.h
/usr/include/semanage/fcontexts_local.h
/usr/include/semanage/fcontexts_policy.h
/usr/include/semanage/handle.h
/usr/include/semanage/iface_record.h
/usr/include/semanage/interfaces_local.h
/usr/include/semanage/interfaces_policy.h
/usr/include/semanage/modules.h
/usr/include/semanage/node_record.h
/usr/include/semanage/nodes_local.h
/usr/include/semanage/nodes_policy.h
/usr/include/semanage/port_record.h
/usr/include/semanage/ports_local.h
/usr/include/semanage/ports_policy.h
/usr/include/semanage/semanage.h
/usr/include/semanage/seuser_record.h
/usr/include/semanage/seusers_local.h
/usr/include/semanage/seusers_policy.h
/usr/include/semanage/user_record.h
/usr/include/semanage/users_local.h
/usr/include/semanage/users_policy.h