Summary:
Now that the Yoga library supports percentage values, the results returned from it's API were changed.
`YGNodeStyleGetPadding` returns the explicit value that you set, whereas `YGNodeLayoutGetPadding` returns the computed value. Since we are planning to build support for percentages, I'm modifying our API so that it strictly returns the value that was set. As a result:
```
view.yoga.margin = 10;
// view.yoga.margin == 10
// view.yoga.marginLeftWidth == 0
// view.yoga.marginRightWidth == 0
// etc.
```
Reviewed By: emilsjolander
Differential Revision: D4543471
fbshipit-source-id: a731025cd4b47e9f1a559c766494fc5a259291ae
3c9f620c77