[MIPS] Add support to gyp files to build Native Client inside of Chromium

src/trusted/validator/x86/decoder/ncval_x86_decoder.gyp

 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Build the specific library dependencies for decoding x86 instructions.
 # Used to define a "full" decoder (used by ncdis). Currently used to decode
 # instructions for the x86-64 validator. Future plans is to encorporate the
 # decoder into the x86-32 validator.
 {
   'includes': [
@@ skipping 156 matching lines @@
           'type': 'static_library',
           'variables': {
             'target_base': 'nc_decoder',
           },
           'dependencies': [
             'nc_opcode_modeling_x86_64',
             '<(DEPTH)/native_client/src/trusted/validator/x86/validate_x86.gyp:ncval_base_x86_64',
            ],
         }],
     }],
-    [ 'target_arch=="arm"', {
-      'targets': []
-    }],
   ],
 }