Build dependency on external cppunit

[Richard Cochran]

On Fri, May 08, 2015 at 03:31:39PM +0200, Richard Cochran wrote:
> I should probably add that I am trying to cross compile LO (I know, I
> know, don't ask why), and it is clear that building cross is not fully
> implemented, but in this case I think it should still work.

Ok, it is somehow related to the cross compile configuration.  The
'make cppunit.all' works as expected with a native build.

Sigh,
Richard