Pass --noharmony-scoping to tests validating that we throw on 'const' in strict mode.

test/preparser/strict-const.js

Index: test/preparser/strict-const.js
diff --git a/test/preparser/strict-const.js b/test/preparser/strict-const.js
index 2b9230c05367c8eaca97de1651e7e3a68d13338f..97b908128ed6ddd775ae79acbb8ae7cdbab91a07 100644
--- a/test/preparser/strict-const.js
+++ b/test/preparser/strict-const.js
@@ -24,6 +24,8 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Flags: --noharmony-scoping
 
 "use strict";
 const x = 42;