Fix the async compiler, and pub's async compiler test.

sdk/lib/_internal/pub/test/async_compile_test.dart

Index: sdk/lib/_internal/pub/test/async_compile_test.dart
diff --git a/sdk/lib/_internal/pub/test/async_compile_test.dart b/sdk/lib/_internal/pub/test/async_compile_test.dart
index c157f67c1198dbad0b24d0ee73b1fd175aee96e2..a3216d7c32bb22ede656ab00451327004cfca489 100644
--- a/sdk/lib/_internal/pub/test/async_compile_test.dart
+++ b/sdk/lib/_internal/pub/test/async_compile_test.dart
@@ -16,9 +16,8 @@ void main() {
   integration("the generated pub source is up to date", () {
     var compilerArgs = Platform.executableArguments.toList()..addAll([
       p.join(pubRoot, 'bin', 'async_compile.dart'),
-      '--force', '--verbose', '--no-snapshot',
-      p.join(sandboxDir, "pub_generated"),
-      p.join(sandboxDir, "build")
+      '--force', '--verbose',
+      p.join(sandboxDir, "pub_generated")
     ]);
 
     new ScheduledProcess.start(Platform.executable, compilerArgs).shouldExit(0);