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

src/trusted/service_runtime/linux/nacl_bootstrap.gyp

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     '../../../../build/common.gypi',
   ],
   'conditions': [
     ['target_arch=="x64"', {
       'variables': {
         # No extra reservation.
         'nacl_reserve_top': '0x0',
       }
     }],
     ['target_arch=="ia32"', {
       'variables': {
         # 1G address space.
         'nacl_reserve_top': '0x40000000',
       }
     }],
     ['target_arch=="arm"', {
       'variables': {
         # 1G address space, plus 8K guard area above.
         'nacl_reserve_top': '0x40002000',
       }
     }],
+    ['target_arch=="mipsel"', {
+      'variables': {
+        # 1G address space, plus 32K guard area above.
+        'nacl_reserve_top': '0x40008000',
+      }
+    }],
   ],
   'targets': [
     {
       'target_name': 'nacl_bootstrap_munge_phdr',
       'type': 'executable',
       'toolsets': ['host'],
       'sources': [
         'nacl_bootstrap_munge_phdr.c',
       ],
       'libraries': [
@@ skipping 110 matching lines @@
             ['target_arch=="ia32"', {
               'variables': {
                 'linker_emulation': 'elf_i386',
               }
             }],
             ['target_arch=="arm"', {
               'variables': {
                 'linker_emulation': 'armelf_linux_eabi',
               }
             }],
+            ['target_arch=="mipsel"', {
+              'variables': {
+                'linker_emulation': 'elf32ltsmip',
+              },
+            }],
           ],
           'action': ['python', 'ld_bfd.py',
                      # ld_bfd.py needs to know the target compiler used for the
                      # build but the $CXX environment variable might only be
                      # set at gyp time. This is a hacky way to bake the correct
                      # CXX into the build at gyp time.
                      # TODO(sbc): Do this better by providing some gyp syntax
                      # for accessing the name of the configured compiler, or
                      # even a better way to access gyp time environment
                      # variables from within a gyp file.
@@ skipping 40 matching lines @@
         'inputs': ['nacl_bootstrap_munge_phdr.py',
                    '<(PRODUCT_DIR)/nacl_bootstrap_munge_phdr',
                    '<(PRODUCT_DIR)/nacl_bootstrap_raw'],
         'outputs': ['<(PRODUCT_DIR)/nacl_helper_bootstrap'],
         'message': 'Munging ELF program header',
         'action': ['python', '<@(_inputs)', '<@(_outputs)']
       }],
     },
   ],
 }