[ARM] VFP11 denorm erratum workaround in linker

[Paul Brook]

> This patch is dependent on a Newlib patch to add the .vfp11_veneer
> section to libgloss's linker scripts. That will follow shortly.

I think FSF newlib uses the default linker scripts, so should will work 
anyway. The arm libgloss linker scripts are a CodeSourcery special.

Paul