Duplicate test fix.

packages/flutter_tools/test/analyze_duplicate_names_test.dart

@@ -38,9 +38,8 @@ void main() {
       return createTestCommandRunner(command).run(
         <String>['analyze', '--no-current-package', '--no-current-directory', dartFileA.path, dartFileB.path]
       ).then((int code) {
-        expect(code, 1);
-        expect(testLogger.errorText, '[warning] The imported libraries \'a.dart\' and \'b.dart\' cannot have the same name \'test\' (${dartFileB.path})\n');
-        expect(testLogger.statusText, 'Analyzing 2 entry points...\n');
+        expect(code, 0);
+        expect(testLogger.statusText, startsWith('Analyzing 2 files...\nNo analyzer warnings!'));
       });
 
     }, overrides: <Type, dynamic>{