Fix typo of function name in ListView documentation

Summary:
When I read documents, I usually 'search within page' to see where they talk about specific things.
So I found this fix to be pretty useful. Hope it'll be merged!
Closes https://github.com/facebook/react-native/pull/1146
Github Author: Yuta Okazaki <s04155yo@gmail.com>

Test Plan: Imported from GitHub, without a `Test Plan:` line.

Libraries/CustomComponents/ListView/ListView.js

@@ -87,7 +87,7 @@ var SCROLLVIEW_REF = 'listviewscroll';
  * smoothly while dynamically loading potentially very large (or conceptually
  * infinite) data sets:
  *
- *  * Only re-render changed rows - the hasRowChanged function provided to the
+ *  * Only re-render changed rows - the rowHasChanged function provided to the
  *    data source tells the ListView if it needs to re-render a row because the
  *    source data has changed - see ListViewDataSource for more details.
  *