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

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https://hg.mozilla.org/integration/gaia-central/rev/d79e4cc1eb50
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1114899 - merge pull request #26964 from anefzaoui:bug-1114899 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/77ef905ad26c
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 1114899 - [RTL] FM Radio frequency wheel is misaligned
Bumping manifests a=b2g-bump