[inspector] add inspector protocol parser test build target.

src/v8.gyp

Index: src/v8.gyp
diff --git a/src/v8.gyp b/src/v8.gyp
index ad9a7e7c7f3df9f68017acc41d15280d8609959f..7e3061db4f46dfe58d791a5c3459a61c3beb3dac 100644
--- a/src/v8.gyp
+++ b/src/v8.gyp
@@ -2313,6 +2313,10 @@
         },
       ],
     },
+    { 'target_name': 'inspector_protocol',

[Michael Achenbach, 2016/07/26 14:27:45]

Don't think we need this here, maybe rather add this to all.gypi.

Also, inspector_protocol is a static library. Why have this as a standalone
target?

[Yang, 2016/07/27 06:42:25]

Done.

+      'type': 'none',
+      'dependencies': ['<(inspector_gyp_path):inspector_protocol'],
+    },
     {
       'target_name': 'postmortem-metadata',
       'type': 'none',