Fixing TouchableOpacity and TouchableHighlight documentation

Summary:
Found a typo in the TouchableOpacity and TouchableHighlight documentation
Closes https://github.com/facebook/react-native/pull/292
Github Author: Ryan Warren <ryan@war.re>

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

Libraries/Components/Touchable/TouchableHighlight.js

@@ -50,7 +50,7 @@ var DEFAULT_PROPS = {
  *         style={styles.button}
  *         source={require('image!myButton')}
  *       />
- *     </View>
+ *     </TouchableHighlight>
  *   );
  * },
  * ```

Libraries/Components/Touchable/TouchableOpacity.js

@@ -39,7 +39,7 @@ var onlyChild = require('onlyChild');
  *         style={styles.button}
  *         source={require('image!myButton')}
  *       />
- *     </View>
+ *     </TouchableOpacity>
  *   );
  * },
  * ```