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

========

https://hg.mozilla.org/integration/gaia-central/rev/911756823e45
Author: John Ford <john@johnford.info>
Desc: Merge pull request #10932 from brendandahl/pdfjs-v0.8.326

Bug 892721 - Update gaia pdf.js to version 0.8.326.

========

https://hg.mozilla.org/integration/gaia-central/rev/4631d9e630a8
Author: Brendan Dahl <brendan.dahl@gmail.com>
Desc: Bug 892721 - Update gaia pdf.js to version 0.8.326.