Enabling graphite on all architectures

[Martin Hosken]

Dear All,

I notice in configure.ac that graphite is auto disabled for Darwin, iOS and Android. I'm wondering why this is the case and whether we can remove that constraint. The graphite engine used to be dependent on stl, but that is no longer the case. It adds 100K to vcl (and my sympathies are with those trying to shoehorn into the 50MB limit on Android). But it will repay with increased rendering speed.

Yours,
Martin