Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/f2202849a093
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #20290 from EverythingMe/1020961-indications

Bug 1020961 - [Collection app] Loading progress indicator and Connectivity message

========

https://hg.mozilla.org/integration/gaia-central/rev/b86d1c9488b2
Author: Ran Ben Aharon <ran@ranbena.com>
Desc: Bug 1020961 - [Collection app] Loading progress indicator and Connectivity message [r=amirn, kgrandon]

========

https://hg.mozilla.org/integration/gaia-central/rev/cbc39ad74409
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #20412 from pivanov/bug-1024295

Bug 1024295 - [bb][header] Missing images

========

https://hg.mozilla.org/integration/gaia-central/rev/13b70bdc85ed
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1024295 - [bb][header] Missing images
Bumping manifests a=b2g-bump