fix #27771, create directory if needed

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

Index: pkg/dev_compiler/lib/src/compiler/command.dart
diff --git a/pkg/dev_compiler/lib/src/compiler/command.dart b/pkg/dev_compiler/lib/src/compiler/command.dart
index 87b2a57e70a76cd8a409c715ca393a0e97aa5666..7d5e2121b9d3932d31e10c3dbd67c02352e2e61f 100644
--- a/pkg/dev_compiler/lib/src/compiler/command.dart
+++ b/pkg/dev_compiler/lib/src/compiler/command.dart
@@ -170,6 +170,7 @@ void _compile(ArgResults argResults, void printFn(Object obj)) {
       var file = new File(summaryPath);
       if (!file.existsSync() ||
           _changed(file.readAsBytesSync(), module.summaryBytes)) {
+        if (!file.parent.existsSync()) file.parent.createSync(recursive: true);
         file.writeAsBytesSync(module.summaryBytes);
       }
     }