COMPASS-101: Update hadron-build and pin electron: (#514)

* COMPASS-101: Update hadron-build and pin electron:

Updates hadron-build to the latest with the updated electron-packager
and electron dependencies, which includes symlinking the executable.

* COMPASS-101: Back to electron 1.2.8

Author: durran

package.json

@@ -159,7 +159,7 @@
     "chai-as-promised": "^5.1.0",
     "electron-prebuilt": "1.2.8",
     "eslint-config-mongodb-js": "^2.2.0",
-    "hadron-build": "^0.9.6",
+    "hadron-build": "^1.0.0-beta.1",
     "mocha": "^2.3.4",
     "mongodb-js-precommit": "^0.2.9",
     "mongodb-runner": "^3.2.0",