test-parsing.cc: Test fix.

The syntax of this test snippet was so wrong ("function function") that it
wasn't testing what it was supposed to test.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/896043003

Cr-Commit-Position: refs/heads/master@{#26433}

test/cctest/test-parsing.cc

@@ -2246,8 +2246,8 @@ TEST(ErrorsNameOfStrictFunction) {
     "interface() {\"use strict\";}",
     "yield() {\"use strict\";}",
     // Future reserved words are always illegal
-    "function super() { }",
-    "function super() {\"use strict\";}",
+    "super() { }",
+    "super() {\"use strict\";}",
     NULL
   };