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

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https://hg.mozilla.org/integration/gaia-central/rev/88dffe73a460
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #19388 from justindarc/bug1006281

Bug 1006281 - [tarako]Camera app can't use internal storage when interna...

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https://hg.mozilla.org/integration/gaia-central/rev/dfe437311159
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 1006281 - [tarako]Camera app can't use internal storage when internal storage size is less than 5MB.
Bumping manifests a=b2g-bump