libkioarchive: install header into own visibility subdir, add version header
Before:
include/KF5/kio_archivebase.h
include/KF5/libkioarchive_export.h
After:
include/KioArchive/kio_archivebase.h
include/KioArchive/libkioarchive_export.h
include/KioArchive/kioarchive_version.h