Bumping gaia.json for 4 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/e30c84c7edf4
Author: mozshiao9 <mshiao@mozilla.com>
Desc: Merge pull request #10887 from mozshiao9/master_contacts_881140

Bug 881140 - hdpi/xhdpi resolution assets and layout for Contacts app

========

https://hg.mozilla.org/integration/gaia-central/rev/d76382ea4e27
Author: Mark Shiao <mshiao@mozilla.com>
Desc: Bug 881140 - hdpi/xhdpi resolution assets and layout for Contacts app

========

https://hg.mozilla.org/integration/gaia-central/rev/a092f04029d6
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #10883 from crdlc/bug-891781

Bug 891781 - [Facebook] Delete all friends and add some one is broken

========

https://hg.mozilla.org/integration/gaia-central/rev/c718ca1beac1
Author: crdlc <crdlc@tid.es>
Desc: Bug 891781 - [Facebook] Delete all friends and add some one is broken