add setFlexBasisAuto (#1112)

Summary:
fix https://github.com/facebook/yoga/issues/766

is it possible to compile yoga and release the fix? Or javascript part of yoga is not maintained?

Pull Request resolved: https://github.com/facebook/yoga/pull/1112

Reviewed By: yungsters

Differential Revision: D40026371

Pulled By: NickGerleman

fbshipit-source-id: c2f3b18e2d3951338ce37cd3a319249996dd8a2e

javascript/sources/Node.cc

@@ -144,6 +144,10 @@ void Node::setFlexBasisPercent(double flexBasis) {
   YGNodeStyleSetFlexBasisPercent(m_node, flexBasis);
 }
 
+void Node::setFlexBasisAuto() {
+  YGNodeStyleSetFlexBasisAuto(m_node);
+}
+
 void Node::setFlexGrow(double flexGrow) {
   YGNodeStyleSetFlexGrow(m_node, flexGrow);
 }