Add gabbro+chalk support (lol please don't use on chalk - this will be disabled eventually)

package.json

@@ -17,7 +17,9 @@
         "sdkVersion": "3",
         "enableMultiJS": true,
         "targetPlatforms": [
-            "emery"
+            "chalk",
+            "emery",
+            "gabbro"
         ],
         "watchapp": {
             "watchface": true