Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-1_3/rev/1364fe0da479
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17455 from KevinGrandon/v1.3

Bug 986268 - Voicemail test is failing on v1.3 a=TEST_ONLY

========

https://hg.mozilla.org/integration/gaia-1_3/rev/cf7f3ea4722d
Author: Bobby Holley <bobbyholley@gmail.com>
Desc: Bug 976935 - Use a stub rather than a spy for the Notification constructor. v2
Bumping manifests a=b2g-bump