add missing RCTConvert import

Summary: `RCTComponentData` needs `RCTConvert` class, but it doesn't import it directly. This diff is changing it. Should be noop.

Reviewed By: fkgozali

Differential Revision: D3185141

fb-gh-sync-id: f845e3555d30c9fd9b39579194590ddf103a5a19
fbshipit-source-id: f845e3555d30c9fd9b39579194590ddf103a5a19

React/Views/RCTComponentData.m

@@ -12,6 +12,7 @@
 #import <objc/message.h>
 
 #import "RCTBridge.h"
+#import "RCTConvert.h"
 #import "RCTShadowView.h"
 #import "RCTUtils.h"
 #import "UIView+React.h"