add traceur test suite

test/fixtures/traceur/Destructuring/Array.js

@@ -0,0 +1,25 @@
+function destructArray() {
+  var a, b, c, d;
+  [a, [b], c, d] = ['hello', [',', 'junk'], ['world']];
+  return {
+    a: a,
+    b: b,
+    c: c,
+    d: d
+  };
+}
+
+// ----------------------------------------------------------------------------
+
+var result = destructArray();
+assert.equal('hello', result.a);
+assert.equal(',', result.b);
+assertArrayEquals(['world'], result.c);
+assert.isUndefined(result.d);
+
+function testNested() {
+  var a;
+  [[a] = ['b']] = [];
+  return a;
+}
+assert.equal(testNested(), 'b');