fix broken link

Summary:
The link to `'ShadowPropTypesIOS'` in `View` and `Image` docs is broken since RN0.29
Closes https://github.com/facebook/react-native/pull/8814

Differential Revision: D3628978

Pulled By: lacker

fbshipit-source-id: b233e191d1e1e0731cd5b2fe33287d68aa12e041

website/layout/AutodocsLayout.js

@@ -253,13 +253,17 @@ var ComponentDoc = React.createClass({
         {(style.composes || []).map((name) => {
           var link;
           if (name === 'LayoutPropTypes') {
-            name = 'Flexbox';
+            name = 'Layout Props';
             link =
-              <a href={'docs/' + slugify(name) + '.html#proptypes'}>{name}...</a>;
+              <a href={'docs/' + slugify(name) + '.html#props'}>{name}...</a>;
+          } else if (name === 'ShadowPropTypesIOS') {
+            name = 'Shadow Props';
+            link =
+              <a href={'docs/' + slugify(name) + '.html#props'}>{name}...</a>;
           } else if (name === 'TransformPropTypes') {
             name = 'Transforms';
             link =
-              <a href={'docs/' + slugify(name) + '.html#proptypes'}>{name}...</a>;
+              <a href={'docs/' + slugify(name) + '.html#props'}>{name}...</a>;
           } else {
             name = name.replace('StylePropTypes', '');
             link =