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

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https://hg.mozilla.org/integration/gaia-central/rev/feeaf2d3d7c8
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #16987 from jmcanterafonseca/fb_num_friends_done

Bug 838605 - [CONTACTS][FACEBOOK] Inconsistent notification of the numbe...

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https://hg.mozilla.org/integration/gaia-central/rev/8a1441efa99e
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 838605 - [CONTACTS][FACEBOOK] Inconsistent notification of the number of Facebook friends available to import
Bumping manifests a=b2g-bump