Inline immutable values in layout algorithm

Store immutable values from the node being laid out to avoid unnecessary
method invocations during layout calculation. This gives us a 3%-5%
performance boost in my benchmarks on Android.

src/transpile.js

@@ -261,6 +261,9 @@ function transpileAnnotatedJStoC(jsCode) {
     .replace(/node\./g, 'node->')
     .replace(/child\./g, 'child->')
     .replace(/parent\./g, 'parent->')
+    .replace(/getPositionType\((.+?)\)/g, '$1->style.position_type')
+    .replace(/getJustifyContent\((.+?)\)/g, '$1->style.justify_content')
+    .replace(/getAlignContent\((.+?)\)/g, '$1->style.align_content')
     .replace(/var\/\*\(c\)!([^*]+)\*\//g, '$1')
     .replace(/var\/\*([^\/]+)\*\//g, '$1')
     .replace(/ === /g, ' == ')