[inspector] Build inspector under v8_enable_inspector build flag.

gypfiles/standalone.gypi

Index: gypfiles/standalone.gypi
diff --git a/gypfiles/standalone.gypi b/gypfiles/standalone.gypi
index 7116f622dcfc148bce792ce668107a0e0f4e0eec..9a030041d9e8776c7122ba013bdfabd27dee9782 100644
--- a/gypfiles/standalone.gypi
+++ b/gypfiles/standalone.gypi
@@ -46,6 +46,7 @@
     'msvs_multi_core_compile%': '1',
     'mac_deployment_target%': '10.7',
     'release_extra_cflags%': '',
+    'v8_enable_inspector%': 0,
     'variables': {
       'variables': {
         'variables': {