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

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https://hg.mozilla.org/integration/gaia-2_0/rev/63f1138b776c
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #26026 from jmcanterafonseca/logout_facebook_20

Bug 1084224 - [Midori 2.0][Contacts][Facebook]keep logging out interface...

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https://hg.mozilla.org/integration/gaia-2_0/rev/e06039cff8a2
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1084224 - [Midori 2.0][Contacts][Facebook]keep logging out interface when user clicks 'x' on the window
Bumping manifests a=b2g-bump