Fix rendering of fonts matched based on stretch

If the fontdatabase matches a font based on the stretch aka width
then the stretch factor on the font-engine needs to be 100
to avoid the fontengine doing manual stretching.

Without this a font requested with 75 stretch and matched with a font
of 75 stretch would be further condensed 25% by the fontengine.

Change-Id: Ib85ff027420c0ce891b0808dab13d25417d22df1
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>