Build nacl_list_mappings and nosys w/ pnacl using GYP.

src/untrusted/nosys/nosys.gyp

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 {
   'includes': [
     '../../../build/common.gypi',
   ],
   'variables': {
     'common_sources': [
     ],
   },
   'targets' : [
     {
       'target_name': 'nosys_lib',
       'type': 'none',
       'variables': {
         'nlib_target': 'libnosys.a',
         'build_glibc': 0,
         'build_newlib': 1,
+        'build_pnacl_newlib': 1,
       },
       'sources': [
         'access.c',
         'chdir.c',
         'chmod.c',
         'chown.c',
         'endpwent.c',
         'environ.c',
         'errno.c',
         '__errno.c',
@@ skipping 60 matching lines @@
         'vfork.c',
         'wait.c',
         'waitpid.c',
       ],
       'dependencies': [
         '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
       ],
     },
   ],
 }