[vm] Enable mirrors in product mode. Allows building a product mode SDK.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index 861b13bbb7c781a0a4948992e3ceac8b4ac0122c..2b6f35d5ece2b5df2583af2a053fd4c76d494210 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -456,9 +456,14 @@ mirrors/metadata_allowed_values_test/31: Crash # Issue 25911
 [ $compiler != dart2js ]
 async/dart2js_uncaught_error_test: Skip  # JS-integration only test
 
-[ $compiler == precompiler || $mode == product ]
+[ $compiler == precompiler ]
 mirrors/*: SkipByDesign
 
+[ $compiler == none && $mode == product ]
+mirrors/load_library_test: RuntimeError,OK # Deferred loaded eagerly
+mirrors/library_import_deferred_loading_test: RuntimeError,OK # Deferred loaded eagerly
+mirrors/library_enumeration_deferred_loading_test: RuntimeError,OK # Deferred loaded eagerly
+
 [ $compiler == precompiler ]
 convert/chunked_conversion_utf88_test: Pass, Timeout
 convert/utf85_test: Pass, Timeout