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

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https://hg.mozilla.org/integration/gaia-central/rev/eb717d7e3ae9
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #25158 from kumarrishav/Bug-1014234

Bug 1014234 - [B2G][1.4][Flame][MMS] Message report displays message size in KB at minimum, r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/fa9f329ebc01
Author: kumarrishav <rishav006@gmail.com>
Desc: Bug 1014234 - [B2G][1.4][Flame][MMS] Message report displays message size in KB at minimum. r=schung
Bumping manifests a=b2g-bump