This is in preparation for using doxygen to generate IDL docs. Because
the file names generated by doxygen are essentially random, it is not
possible to use a Package to deliver them. And we really do not want to
go back to using Zip, as unpacking slows the installation down.

Change-Id: I5f4aa6bf10c6aab30a5b1870e04dca723c123317
Reviewed-on: https://gerrit.libreoffice.org/3774Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>