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

src/trusted/service_runtime/linux/nacl_bootstrap.gyp

Index: src/trusted/service_runtime/linux/nacl_bootstrap.gyp
diff --git a/src/trusted/service_runtime/linux/nacl_bootstrap.gyp b/src/trusted/service_runtime/linux/nacl_bootstrap.gyp
index 784e8fff4cfedd565f0029a40555855103eb0c3a..facd006c3d185b2f47f71a12dd28e5ba57548cec 100644
--- a/src/trusted/service_runtime/linux/nacl_bootstrap.gyp
+++ b/src/trusted/service_runtime/linux/nacl_bootstrap.gyp
@@ -25,6 +25,12 @@
         'nacl_reserve_top': '0x40002000',
       }
     }],
+    ['target_arch=="mipsel"', {
+      'variables': {
+        # 1G address space, plus 8K guard area above.
+        'nacl_reserve_top': '0x40002000',
+      }
+    }],
   ],
   'targets': [
     {
@@ -155,6 +161,11 @@
                 '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