edje: add fixed automatically for optimizing edje calc speed.

edje: add fixed automatically for optimizing edje calc speed.

Summary:
Applications usually use edje syntax like as,

```
 part { name :"bg";
     type: SWALLOW;
     description {
          state: "default" 0.0;
          rel1.relative: 0.0 0.0;
          rel2.relative: 0.0 0.0;
          align: 0.0 0.0;
          min: 100 100;
     }
 }

```
But edje does not calculate it exactly without "fixed: 1 1".
So edje calculation is repeated until 4000 x 4000, it is waste of time.

Reviewers: woohyun, raster, Hermet, id213sin, cedric

Reviewed By: cedric

Subscribers: cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D3801

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>
Change-Id: I36a0983fe5af1916d7b904c5c82d988f12c94784