Update comment about jsx react-native in es5.ts

Author: David Sheldrick

src/compiler/transformers/es5.ts

@@ -11,7 +11,7 @@ namespace ts {
     export function transformES5(context: TransformationContext) {
         const compilerOptions = context.getCompilerOptions();
 
-        // enable emit notification only if using --jsx preserve
+        // enable emit notification only if using --jsx preserve or react-native
         let previousOnEmitNode: (emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) => void;
         let noSubstitution: boolean[];
         if (compilerOptions.jsx === JsxEmit.Preserve || compilerOptions.jsx === JsxEmit.ReactNative) {