Fix .gyp file and avoid adding -m32 on 32 bit systems.

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index aa45e0b3912d7ed3f723368165554908628843a6..6d7c805fe8349e083da9fa8dea128bdaa1c68f52 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -400,6 +400,9 @@
     {
       'target_name': 'v8_base',
       'type': '<(library)',
+      'defines': [
+        'V8_ARCH_IA32'
+      ],
       'include_dirs+': [
         '../../src',
         '../../src/ia32',
@@ -455,6 +458,9 @@
     {
       'target_name': 'v8_nosnapshot',
       'type': '<(library)',
+      'defines': [
+        'V8_ARCH_IA32'
+      ],
       'dependencies': [
         'js2c',
         'v8_base',
@@ -484,6 +490,9 @@
     {
       'target_name': 'v8',
       'type': '<(library)',
+      'defines': [
+        'V8_ARCH_IA32'
+      ],
       'dependencies': [
         'js2c',
         'mksnapshot',
@@ -521,6 +530,9 @@
     {
       'target_name': 'v8_shell',
       'type': 'executable',
+      'defines': [
+        'V8_ARCH_IA32'
+      ],
       'dependencies': [
         'v8',
       ],
@@ -548,6 +560,9 @@
         'd8_js2c',
         'v8',
       ],
+      'defines': [
+        'V8_ARCH_IA32'
+      ],
       'include_dirs': [
         '../../src',
       ],
@@ -585,7 +600,7 @@
         'js2c',
       ],
       'defines': [
-        'ARM',
+        'V8_ARCH_ARM',
       ],
       'include_dirs+': [
         '../../src',
@@ -643,7 +658,7 @@
         'v8_arm',
       ],
       'defines': [
-        'ARM',
+        'V8_ARCH_ARM',
       ],
       'sources': [
         '../../samples/shell.cc',
@@ -663,7 +678,7 @@
         'v8_arm',
       ],
       'defines': [
-        'ARM',
+        'V8_ARCH_ARM',
       ],
       'include_dirs': [
         '../../src',