Temporarily disable overlapping summary check

pkg/dev_compiler/lib/src/compiler/compiler.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:collection' show HashSet, Queue;
 import 'dart:convert' show JSON;
 import 'dart:io' show File;
 
 import 'package:analyzer/analyzer.dart'
     show AnalysisError, CompilationUnit, ErrorSeverity;
@@ skipping 72 matching lines @@
 
     var analysisOptions = contextBuilder.getAnalysisOptions(analysisRoot);
     var sdk = contextBuilder.findSdk(null, analysisOptions);
 
     var sdkResolver = new DartUriResolver(sdk);
 
     // Read the summaries.
     summaryData ??= new SummaryDataStore(options.summaryPaths,
         resourceProvider: resourceProvider,
         recordDependencyInfo: true,
-        disallowOverlappingSummaries: true);
+        // TODO(vsm): Reset this to true once we cleanup internal build rules.
+        disallowOverlappingSummaries: false);
 
     var sdkSummaryBundle = sdk.getLinkedBundle();
     if (sdkSummaryBundle != null) {
       summaryData.addBundle(null, sdkSummaryBundle);
     }
 
     var srcFactory = createSourceFactory(options,
         sdkResolver: sdkResolver,
         fileResolvers: fileResolvers,
         summaryData: summaryData,
@@ skipping 520 matching lines @@
     case "dart":
     case "package":
     case "file":
       // A valid URI.
       return uri;
     default:
       // Assume a file path.
       return new Uri.file(path.absolute(source));
   }
 }