...in preparation of packaging the per-locale data properly.

non-locale: GeneratedPackage_html_media
            Package_html_dynamic
            Package_html_static

per-locale: GeneratedPackage_html_lang_generated
            Package_html_lang

This is the core part of a change that spans core and helpcontent2.

Change-Id: I0e014649129f9ec498e5307c64807efa95eee0de