Chart XShape tests

[Andras Timar]

Hi,

I added a new unit test recently which checks Marco Cecchetti's work
on pie chart label layout in case of inside placement, best fit case.

http://cgit.freedesktop.org/libreoffice/core/commit/?id=312cab50e057a85cbfd773e928eda3aadd69060c

These Chart XShape dump tests do not run by default, they have to be
enabled by the --enable-chart-tests switch. On the other hand, the
same type of XShape dump tests are enabled by default for Impress. Is
there a special reason for this?

Thanks,
Andras