winphone: deploy default font files as DirectWrite is not supported

For Visual Studio we can add the fonts we want to deploy to the
project file by using the DEPLOYMENT variable.

Change-Id: Ifc87a12a2bb4ec4ff1c0a8dc8f0b1fbf37e4e513
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
WinPhone: Install DejaVu ttf fonts into Qt

As these fonts are deployed as part of the package for WinPhone projects
by default they have to be installed in order to be available in the
packages.

Change-Id: Iaaca7b7db0525f06d3e1716d5a337550ffb1dea9
Reviewed-by: Andrew Knight <andrew.knight@digia.com>