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

========

https://hg.mozilla.org/integration/gaia-central/rev/0b1b553dbc02
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16316 from KevinGrandon/bug_971542_system_remote_debugger_v2

Bug 971542 - [System2] Instantiable RemoteDebugger r=alive

========

https://hg.mozilla.org/integration/gaia-central/rev/a09355b35f29
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 971542 - [System2] Instantiable RemoteDebugger r=alive
Bumping manifests a=b2g-bump