[es6] Initial support for let/const bindings in sloppy mode

test/mjsunit/harmony/block-scoping-sloppy.js

Index: test/mjsunit/harmony/block-scoping-sloppy.js
diff --git a/test/mjsunit/es6/block-scoping.js b/test/mjsunit/harmony/block-scoping-sloppy.js
similarity index 98%
copy from test/mjsunit/es6/block-scoping.js
copy to test/mjsunit/harmony/block-scoping-sloppy.js
index 5f481b8bf2ebb9f87d8bc78d0972aa3097a35937..19d1e9afa62ec4c896e5b07f4a9cdf7bb6af4865 100644
--- a/test/mjsunit/es6/block-scoping.js
+++ b/test/mjsunit/harmony/block-scoping-sloppy.js
@@ -25,11 +25,9 @@
 // (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: --allow-natives-syntax
+// Flags: --allow-natives-syntax --harmony-sloppy --no-legacy-const
 // Test functionality of block scopes.
 
-"use strict";
-
 // Hoisting of var declarations.
 function f1() {
   {