Adding [super initialize] to correct misreporting by MDCD
Adding [super initialize] to correct misreporting by MDCD

Summary:
In working to remove dead code from the code base, we identified that a number of classes that subclassed `RCTEventEmitter` were being reported as unused when they are in active use.  That was due to a lack of a `[super initialize]`.  This diff adds the call to super.

Changelog:
[General] [Added] - Call to `super` in `+initialize` of `RCTEventEmitter`

Reviewed By: javache

Differential Revision: D19727783

fbshipit-source-id: 19c6c7f08e7a8b2f764988fdfcd70f92dbf1b74b

janicduplessis/react-native,javache/react-native,hoangpham95/react-native,facebook/react-native,hoangpham95/react-native,pandiaraj44/react-native,arthuralee/react-native,hoangpham95/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hoangpham95/react-native,exponent/react-native,exponentjs/react-native,pandiaraj44/react-native,myntra/react-native,exponentjs/react-native,exponent/react-native,janicduplessis/react-native,pandiaraj44/react-native,javache/react-native,hammerandchisel/react-native,javache/react-native,hammerandchisel/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,javache/react-native,arthuralee/react-native,javache/react-native,hammerandchisel/react-native,hammerandchisel/react-native,hammerandchisel/react-native,javache/react-native,exponent/react-native,facebook/react-native,exponent/react-native,myntra/react-native,exponentjs/react-native,exponent/react-native,exponent/react-native,hoangpham95/react-native,facebook/react-native,pandiaraj44/react-native,arthuralee/react-native,myntra/react-native,arthuralee/react-native,pandiaraj44/react-native,exponentjs/react-native,myntra/react-native,arthuralee/react-native,myntra/react-native,exponentjs/react-native,myntra/react-native,javache/react-native,hoangpham95/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native,pandiaraj44/react-native,exponent/react-native,hoangpham95/react-native,facebook/react-native,exponentjs/react-native,exponentjs/react-native,pandiaraj44/react-native,exponent/react-native,javache/react-native,hammerandchisel/react-native,myntra/react-native,exponentjs/react-native,myntra/react-native,hammerandchisel/react-native,myntra/react-native,janicduplessis/react-native,facebook/react-native,hoangpham95/react-native,janicduplessis/react-native,facebook/react-native,janicduplessis/react-native