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

========

https://hg.mozilla.org/integration/gaia-central/rev/29dfefc0dafb
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #19861 from jmcanterafonseca/fix_fb_import

Bug 1016354 - In occasions in the Console appears "TypeError: fbImportOption is undefined"

========

https://hg.mozilla.org/integration/gaia-central/rev/6f805033d681
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1016354 - In occasions in the Console appears TypeError: fbImportOption is undefined
Bumping manifests a=b2g-bump