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

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https://hg.mozilla.org/integration/gaia-1_4/rev/4f3b1b4767fe
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #19397 from justindarc/bug1006281-v1.4

Bug1006281 v1.4

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https://hg.mozilla.org/integration/gaia-1_4/rev/9c2f62bf9b2f
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