Add netbsd support to gyp build.

build/standalone.gypi

Index: build/standalone.gypi
diff --git a/build/standalone.gypi b/build/standalone.gypi
index 4297f5c84a0507dfdc8ae0cd0c2a06205e054e9d..86f6d46092421a41545421306e8687eb4c93e901 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -1,4 +1,4 @@
-# Copyright 2011 the V8 project authors. All rights reserved.
+# Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
@@ -37,13 +37,16 @@
       'variables': {
         'variables': {
           'conditions': [
-            [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
-              # This handles the Linux platforms we generally deal with. Anything
-              # else gets passed through, which probably won't work very well; such
-              # hosts should pass an explicit target_arch to gyp.
+            ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd"', {
+              # This handles the Linux platforms we generally deal with.
+              # Anything else gets passed through, which probably won't work
+              # very well; such hosts should pass an explicit target_arch
+              # to gyp.
               'host_arch%':
-                '<!(uname -m | sed -e "s/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/mips.*/mips/")',
-            }, {  # OS!="linux" and OS!="freebsd" and OS!="openbsd"
+                '<!(uname -m | sed -e "s/i.86/ia32/;\
+                  s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/mips.*/mips/")',
+            }, {
+              # OS!="linux" and OS!="freebsd" and OS!="openbsd" and OS!="netbsd"
               'host_arch%': 'ia32',
             }],
           ],
@@ -78,7 +81,8 @@
     },
   },
   'conditions': [
-    [ 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
+    ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
+       or OS=="netbsd"', {
       'target_defaults': {
         'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                     '-Wnon-virtual-dtor', '-pthread', '-fno-rtti',
@@ -96,7 +100,9 @@
           }],
         ],
       },
-    }],  # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"'
+    }],
+    # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
+    #  or OS=="netbsd"'
     ['OS=="win"', {
       'target_defaults': {
         'defines': [