Load extraRequiredLibraries from the target passed in the options

pkg/front_end/lib/src/incremental/kernel_driver.dart

Index: pkg/front_end/lib/src/incremental/kernel_driver.dart
diff --git a/pkg/front_end/lib/src/incremental/kernel_driver.dart b/pkg/front_end/lib/src/incremental/kernel_driver.dart
index be9b602b199ec4404681644d3d8828f65f36f6c1..1ca0f2cf5e3953ed4bed43721f8e22ca183201d6 100644
--- a/pkg/front_end/lib/src/incremental/kernel_driver.dart
+++ b/pkg/front_end/lib/src/incremental/kernel_driver.dart
@@ -105,8 +105,8 @@ class KernelDriver {
       return new Future.value();
     }
 
-    _fsState = new FileSystemState(
-        _byteStore, _fileSystem, _uriTranslator, _salt, onFileAdded);
+    _fsState = new FileSystemState(_byteStore, _fileSystem, _options.target,
+        _uriTranslator, _salt, onFileAdded);
   }
 
   /// Return the [FileSystemState] that contains the current file state.