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

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https://hg.mozilla.org/integration/gaia-central/rev/acbae46890ce
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #26575 from brianweet/bug-960259

Bug 960259 - Remove esset character from uppercase alternative list. r=RudyL

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https://hg.mozilla.org/integration/gaia-central/rev/e45ab9ad4070
Author: Brian Weeteling <brianweeteling@gmail.com>
Desc: Bug 960259 - Remove esset character from uppercase alternative list
Bumping manifests a=b2g-bump