[asm.js] Fix invalid test case.

R=clemensh@chromium.org
BUG=v8:6127

Change-Id: I5e1b0d3efdf7f4aede7da83a35c072b5ac85d5c7
Reviewed-on: https://chromium-review.googlesource.com/463026Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44261}

test/mjsunit/mjsunit.status

@@ -659,7 +659,6 @@
 ['variant == asm_wasm', {
   # Issue 6127: We won't fix these in the "old" validator. But we definitely
   # need to re-enable these for the "new" validator.
-  'regress/regress-599719': [SKIP],
   'regress/regress-618608': [SKIP],
   'regress/regress-670808': [SKIP],
   'wasm/asm-wasm-exception-in-tonumber': [SKIP],

test/mjsunit/regress/regress-599719.js

@@ -15,7 +15,7 @@ function __f_8(global, env) {
     i5 = i5 | 0;
     __f_7();
   }
-  return {'__f_9': __f_9}
+  return {__f_9: __f_9}
 }
 function __f_5() {
   var __v_5 = __f_8({}, {'__f_7': __f_7});