Support Xcode variable substitution in Info.plist
As of Xcode 7, Apple recommends setting CFBundleIdentifier to
$(PRODUCT_BUNDLE_IDENTIFIER).
diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
index 78df9a2..d180827 100644
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -15,7 +15,7 @@
import '../flx.dart' as flx;
import '../globals.dart';
import '../services.dart';
-import 'setup_xcodeproj.dart';
+import 'xcodeproj.dart';
String get homeDirectory => path.absolute(Platform.environment['HOME']);