Bumping gaia.json for 3 gaia-central revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/8491429ca188
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 935917 - [Messages] When setting a message's body, we shouldn't try to parse it as HTML r=schung

https://bugzilla.mozilla.org/show_bug.cgi?id=935917

- rewrite the "insert" function for string inputs

========

https://hg.mozilla.org/integration/gaia-central/rev/58d00cc9069d
Author: Askeing Yen (fyen) <askeing@gmail.com>
Desc: Merge pull request #14086 from zacc/bug943591

Bug 943591 - Add explicit wait into keyboard app object so implicit wait...

========

https://hg.mozilla.org/integration/gaia-central/rev/e60ed262e67f
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 943591 - Add explicit wait into keyboard app object so implicit wait is not required r=Askeing