Travis: Update to GCC 4.7.3 for Symbian.

So now we have C++11 support across the board!
Compiler complains about unrecognised instruction on that line. Couldn't
work out why.
On 10/06/2014 12:39 am, "Unknown W. Brackets" <notifications@github.com>
wrote:

> In GPU/Software/Rasterizer.cpp:
>
> > @@ -1493,6 +1493,7 @@ void DrawLine(const VertexData &v0, const VertexData &v1)
> >
> >  		ScreenCoords pprime = ScreenCoords(x, y, z);
> >
> > +#ifndef __SYMBIAN32__
>
> Does it crash or something?
>
> -[Unknown]
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/hrydgard/ppsspp/pull/6269/files#r13543411>.
>