Update gentype output (#6783)

* update gentype outputs

* checking to confirm if the gentype outputs are reviewed as well

Author: cometkim

jscomp/gentype_tests/typescript-react-example/Makefile

@@ -5,6 +5,9 @@ test:
 	npm run build
 	npm run tsc
 	npm run lint
+	@git diff --quiet src/ \
+		|| { echo; echo "Please review the Gentype outputs too!"; echo; false; } \
+		|| exit 1
 
 clean:
 	rm -rf node_modules lib src/*.res.js src/*.gen.tsx