Update .gitignore

Author: knopp

.gitignore

@@ -9,10 +9,16 @@ pubspec.lock
 build/
 ios/.generated/
 ios/Flutter/Generated.xcconfig
+ios/Flutter/flutter_export_environment.sh
 ios/Runner/GeneratedPluginRegistrant.*
 
 # IntelliJ
 *.iml
 *.ipr
 *.iws
 .idea/
+
+example/ios/.generated/
+example/ios/Flutter/Generated.xcconfig
+example/ios/Flutter/flutter_export_environment.sh
+example/ios/Runner/GeneratedPluginRegistrant.*