tools: add objectLiteralShorthandProperties to .eslintrc

Required to make linting pass for using object literal
shorthand properties.

PR-URL: nodejs/node#1760
Reviewed-By: Chris Dickinson <[email protected]>

Author: evanlucas

.eslintrc

@@ -9,6 +9,7 @@ ecmaFeatures:
   binaryLiterals: true
   generators: true
   forOf: true
+  objectLiteralShorthandProperties: true
 
 rules:
   # Possible Errors