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

========

https://hg.mozilla.org/integration/gaia-central/rev/e2d2fff44235
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #20704 from tauzen/Bug1006375v2

Bug 1006375 - [NFC] NfcManager handleTechnologyDiscovered tests, r=gweng

========

https://hg.mozilla.org/integration/gaia-central/rev/3720f39e9075
Author: Krzysztof Mioduszewski <kmioduszewski@gmail.com>
Desc: Bug 1006375 - [NFC] NfcManager handleTechnologyDiscovered tests

========

https://hg.mozilla.org/integration/gaia-central/rev/646eaf44e28a
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #20660 from anefzaoui/issue-895875

Bug 895875 - [BB][RTL] Drawer is messed up when used in RTL languages. r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/502ed628d31f
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 895875 - [BB][RTL] Drawer is messed up when used in RTL languages
Bumping manifests a=b2g-bump