Add a library suitable for libfuzzer with a small unit test runner shell

test/fuzzer/parser_fuzzer.isolate

-# Copyright 2015 the V8 project authors. All rights reserved.
+# Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   'variables': {
     'files': [
-      '<(PRODUCT_DIR)/unittests<(EXECUTABLE_SUFFIX)',
-      './unittests.status',
+      '<(PRODUCT_DIR)/parser_fuzzer<(EXECUTABLE_SUFFIX)',
+      './parser/*',
     ],
   },
   'includes': [
     '../../src/base.isolate',
     '../../tools/testrunner/testrunner.isolate',
   ],
-}
+}