NOJIRA: Updated the version of grunt-gpii

Reapplying 67a2fd6, which was reverted in b6053f9

Author: javihernandez

package.json

@@ -13,7 +13,7 @@
     "grunt-shell": "0.6.4",
     "grunt-contrib-jshint": "~0.9.0",
     "grunt-jsonlint": "1.0.4",
-    "grunt-gpii": "git://github.com/GPII/grunt-gpii.git#a4aca06cbaf7523eb1af56ed65ce6bd30b8ec325",
+    "grunt-gpii": "git://github.com/GPII/grunt-gpii.git#ec8412064e107febb120f0b7437d403453b40d2d",
     "shelljs": "0.3.0"
   },
   "licenses": [