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

========

https://hg.mozilla.org/integration/gaia-central/rev/adc1feca674f
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #16200 from askeing/971605

Bug 971605 - Gaiatest can not restart b2g process on hamachi

========

https://hg.mozilla.org/integration/gaia-central/rev/1ab7753e7698
Author: askeing <askeing@gmail.com>
Desc: Bug 971605 - Gaiatest can not restart b2g process on hamachi
Bumping manifests a=b2g-bump