/usr/include/KF5/KLDAP/KLDAP/ is in libkf5ldap-dev 15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KLDAP/KLDAP/Ber
/usr/include/KF5/KLDAP/KLDAP/LdapAttributeProxyModel
/usr/include/KF5/KLDAP/KLDAP/LdapConfigWidget
/usr/include/KF5/KLDAP/KLDAP/LdapConnection
/usr/include/KF5/KLDAP/KLDAP/LdapControl
/usr/include/KF5/KLDAP/KLDAP/LdapDN
/usr/include/KF5/KLDAP/KLDAP/LdapDefs
/usr/include/KF5/KLDAP/KLDAP/LdapModel
/usr/include/KF5/KLDAP/KLDAP/LdapObject
/usr/include/KF5/KLDAP/KLDAP/LdapOperation
/usr/include/KF5/KLDAP/KLDAP/LdapSearch
/usr/include/KF5/KLDAP/KLDAP/LdapServer
/usr/include/KF5/KLDAP/KLDAP/LdapStructureProxyModel
/usr/include/KF5/KLDAP/KLDAP/LdapUrl
/usr/include/KF5/KLDAP/KLDAP/Ldif