[Development] Enabling SSE2 by default on x86 builds (32-bit)

[Allan Sandfeld Jensen]

On Wednesday 11 December 2013, Knoll Lars wrote:
> PS: Actually I think QtQml in 5.0 and 5.1 was also requiring SSE (because
> of V8).
> 
If not then QtWebKit did. Support for x87 math in the interpreter was added 
and a flag forcing sse math was removed in Qt 5.2.

There was a few bug reports from owners of Athlons. so it did cause a bit of 
trouble.

`Allan