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

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

Index: test/mjsunit/harmony/block-for-sloppy.js
diff --git a/test/mjsunit/es6/block-for.js b/test/mjsunit/harmony/block-for-sloppy.js
similarity index 99%
copy from test/mjsunit/es6/block-for.js
copy to test/mjsunit/harmony/block-for-sloppy.js
index 420c41e610cce619cdfd7e5a549b2d680979a52b..374c450fa08de4b24d2745c8dcc06f9f2529c38d 100644
--- a/test/mjsunit/es6/block-for.js
+++ b/test/mjsunit/harmony/block-for-sloppy.js
@@ -24,7 +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.
-"use strict";
+
+// Flags: --no-legacy-const --harmony-sloppy
 
 function props(x) {
   var array = [];