/usr/include/ is in libkf5gpgmepp-dev 16.04.3-2+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/
/usr/include/KF5/gpgme++/
/usr/include/KF5/gpgme++/assuanresult.h
/usr/include/KF5/gpgme++/configuration.h
/usr/include/KF5/gpgme++/context.h
/usr/include/KF5/gpgme++/data.h
/usr/include/KF5/gpgme++/decryptionresult.h
/usr/include/KF5/gpgme++/defaultassuantransaction.h
/usr/include/KF5/gpgme++/editinteractor.h
/usr/include/KF5/gpgme++/encryptionresult.h
/usr/include/KF5/gpgme++/engineinfo.h
/usr/include/KF5/gpgme++/error.h
/usr/include/KF5/gpgme++/eventloopinteractor.h
/usr/include/KF5/gpgme++/exception.h
/usr/include/KF5/gpgme++/global.h
/usr/include/KF5/gpgme++/gpgadduserideditinteractor.h
/usr/include/KF5/gpgme++/gpgagentgetinfoassuantransaction.h
/usr/include/KF5/gpgme++/gpgmefw.h
/usr/include/KF5/gpgme++/gpgmepp_export.h
/usr/include/KF5/gpgme++/gpgsetexpirytimeeditinteractor.h
/usr/include/KF5/gpgme++/gpgsetownertrusteditinteractor.h
/usr/include/KF5/gpgme++/gpgsignkeyeditinteractor.h
/usr/include/KF5/gpgme++/importresult.h
/usr/include/KF5/gpgme++/interfaces/
/usr/include/KF5/gpgme++/interfaces/assuantransaction.h
/usr/include/KF5/gpgme++/interfaces/dataprovider.h
/usr/include/KF5/gpgme++/interfaces/passphraseprovider.h
/usr/include/KF5/gpgme++/interfaces/progressprovider.h
/usr/include/KF5/gpgme++/key.h
/usr/include/KF5/gpgme++/keygenerationresult.h
/usr/include/KF5/gpgme++/keylistresult.h
/usr/include/KF5/gpgme++/notation.h
/usr/include/KF5/gpgme++/result.h
/usr/include/KF5/gpgme++/scdgetinfoassuantransaction.h
/usr/include/KF5/gpgme++/signingresult.h
/usr/include/KF5/gpgme++/trustitem.h
/usr/include/KF5/gpgme++/verificationresult.h
/usr/include/KF5/gpgme++/vfsmountresult.h
/usr/include/KF5/gpgmepp_version.h
/usr/include/KF5/qgpgme/
/usr/include/KF5/qgpgme/dataprovider.h
/usr/include/KF5/qgpgme/qgpgme_eventloopinteractor.h
/usr/include/KF5/qgpgme/qgpgme_export.h