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

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https://hg.mozilla.org/integration/gaia-central/rev/3ae04d30216f
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #24912 from huskyomega/bug1074774

Bug 1074774 - Backspace is very slow when deleting multiple words.
r=rudylu

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https://hg.mozilla.org/integration/gaia-central/rev/7537f99349c9
Author: huskyomega <huskyomega@gmail.com>
Desc: Bug 1074774 - Backspace is very slow when deleting multiple words.
Bumping manifests a=b2g-bump