Fix NaCl build error with ninja.

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 250 matching lines @@
             # to remove -f* flags, just in case some system's compiler
             # defaults to using PIC for everything.
             '-fno-pic', '-fno-PIC',
             '-fno-pie', '-fno-PIE',
           ],
           'link_settings': {
             'ldflags': [
               # TODO(bradchen): Delete the -B argument when Gold is verified
               # to produce good results with our custom linker script.
               # Until then use ld.bfd.
-              '-B', 'tools/ld_bfd',
+              '-B', '<(PRODUCT_DIR)/../../tools/ld_bfd',
               # This programs is (almost) entirely standalone.  It has
               # its own startup code, so no crt1.o for it.  It is
               # statically linked, and on x86 it actually does not use
               # libc at all.  However, on ARM it needs a few (safe)
               # things from libc, so we don't use '-nostdlib' here.
               '-static', '-nostartfiles',
               # Link with our custom linker script to get out special layout.
-              # TODO(bradnelson): Use some <(foo) instead of chrome/ here.
-              '-Wl,--script=chrome/nacl/nacl_helper_bootstrap_linux.x',
+              '-Wl,--script=<(PRODUCT_DIR)/../../chrome/nacl/nacl_helper_bootstrap_linux.x',
               # On x86-64, the default page size with some
               # linkers is 2M rather than the real Linux page
               # size of 4K.  A larger page size is incompatible
               # with our custom linker script's special layout.
               '-Wl,-z,max-page-size=0x1000',
             ],
           },
         },
         {
           'target_name': 'nacl_helper_bootstrap',
           'dependencies': [
             'nacl_helper_bootstrap_raw',
             'nacl_helper_bootstrap_munge_phdr#host',
           ],
           'type': 'none',
           'actions': [{
               'action_name': 'munge_phdr',
               'inputs': ['nacl/nacl_helper_bootstrap_munge_phdr.py',
                          '<(PRODUCT_DIR)/nacl_helper_bootstrap_munge_phdr',
                          '<(PRODUCT_DIR)/nacl_helper_bootstrap_raw'],
               'outputs': ['<(PRODUCT_DIR)/nacl_helper_bootstrap'],
               'message': 'Munging ELF program header',
               'action': ['python', '<@(_inputs)', '<@(_outputs)']
             }],
           }
       ],
     }],
   ],
 }