Add Gapic-generated files to logging API. (#1548)

Author: jmuk

packages/logging/package.json

@@ -51,8 +51,10 @@
   ],
   "dependencies": {
     "@google-cloud/common": "^0.3.0",
+    "arguejs": "^0.2.3",
     "arrify": "^1.0.0",
     "extend": "^3.0.0",
+    "google-gax": "^0.6.0",
     "google-proto-files": "^0.2.1",
     "is": "^3.0.1",
     "string-format-obj": "^1.0.0"

packages/logging/src/index.js

@@ -575,3 +575,4 @@ Logging.Logging = Logging;
 Logging.Sink = Sink;
 
 module.exports = Logging;
+module.exports.v2 = require('./v2');