Summary:
1, Change bottom to be based� on height of parent.
2, Respect margin value when layout with right/bottom.
Closes https://github.com/facebook/yoga/pull/552
Differential Revision: D5102090
Pulled By: emilsjolander
fbshipit-source-id: dca291413ffc2027d7628f4c8b8eeeb0b4823bc2