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

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https://hg.mozilla.org/integration/gaia-central/rev/e9dbd79459ee
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #16324 from vingtetun/bug969544

Bug 969544 - Toggling the highlighted class of a keyboard key create ref...

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https://hg.mozilla.org/integration/gaia-central/rev/cab98ec3a5ef
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 969544 - Toggling the highlighted class of a keyboard key create reflow. r=djf
Bumping manifests a=b2g-bump