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

========

https://hg.mozilla.org/integration/gaia-central/rev/bd449b9d100a
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #12297 from julienw/917028-add-more-than-1-contact

Bug 917028 - [B2G][SMS] Compose an SMS: Unable to add more than one reci...

========

https://hg.mozilla.org/integration/gaia-central/rev/7d24de345d5d
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 917028 - [B2G][SMS] Compose an SMS: Unable to add more than one recipient from Contacts r=borja

Remove the classList handling from updateComposerHeader because since version
1.1 we support sending multiple contacts.