Fix Clang build after r109734

chrome/nacl.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'nacl_target': 0,
     },
     'target_conditions': [
@@ skipping 280 matching lines @@
               'cflags!': [
                 '-fasan',
                 '-w',
               ],
               'conditions': [
                 ['clang==1', {
                   'cflags': [
                     # Prevent llvm-opt from replacing my_bzero with a call
                     # to memset
                     '-ffreestanding',
+                    # But make its <limits.h> still work!
+                    '-U__STDC_HOSTED__', '-D__STDC_HOSTED__=1',
                   ],
                 }],
               ],
             },
             {
               'target_name': 'nacl_helper_bootstrap_raw',
               'type': 'none',
               'dependencies': [
                 'nacl_helper_bootstrap_lib',
               ],
@@ skipping 94 matching lines @@
               'target_name': 'nacl_win64',
               'type': 'none',
               'sources': [],
             },
           ],
         }],
       ],
     }],
   ],
 }