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

test/mjsunit/harmony/block-const-assign-sloppy.js

Index: test/mjsunit/harmony/block-const-assign-sloppy.js
diff --git a/test/mjsunit/es6/block-const-assign.js b/test/mjsunit/harmony/block-const-assign-sloppy.js
similarity index 99%
copy from test/mjsunit/es6/block-const-assign.js
copy to test/mjsunit/harmony/block-const-assign-sloppy.js
index f78faa689ddd98a2ae48ae9bc0456b771581ce63..56300a8db106a6ec988190d443626cf2e752ffba 100644
--- a/test/mjsunit/es6/block-const-assign.js
+++ b/test/mjsunit/harmony/block-const-assign-sloppy.js
@@ -26,13 +26,12 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --harmony-computed-property-names
+// Flags: --no-legacy-const --harmony-sloppy
 
 // Test that we throw early syntax errors in harmony mode
 // when using an immutable binding in an assigment or with
 // prefix/postfix decrement/increment operators.
 
-"use strict";
-
 const decls = [
   // Const declaration.
   function(use) { return "const c = 1; " + use + ";" }, TypeError,