Which means the DOCM-specific code to roundtrip VBA things (project,
data) can be removed. The oox part has to be extended a bit, as at least
for this DOCM bugdoc there is an XML relation of the binary data, while
existing shared code assumed the full VBA project is just a single OLE
blob.

Change-Id: I4085e4dba24475e6fd555e5f34fe7ad0f305c57d
Reviewed-on: https://gerrit.libreoffice.org/38504Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>