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

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https://hg.mozilla.org/integration/gaia-central/rev/e704a7447a7f
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1102319 - merge pull request #27055 from anefzaoui:bug-1102319 to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/5fef55255bc6
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 1102319 - Keypad solid-colored buttons are bunched up too much
Bumping manifests a=b2g-bump