Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f612f81437e1
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #21340 from RudyLu/keyboard/Bug1004597_commit

Bug 1004597 - Add õ to the alternative char menu of English layout.
r=rudylu

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https://hg.mozilla.org/integration/gaia-central/rev/e623c1303c1a
Author: rabbihossain <mdrabbihossain@gmail.com>
Desc: Bug 1004597 - Add õ to the alternative char menu of English layout.

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https://hg.mozilla.org/integration/gaia-central/rev/e95273999179
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #21391 from etiennesegonzac/bug-1034347

Bug 1034347 - Bringing back the edge-candidate logic to prevent crazy overfill rate r=21

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https://hg.mozilla.org/integration/gaia-central/rev/f039478842ef
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1034347 - Bringing back the edge-candidate logic to prevent crazy overfill rate.
Bumping manifests a=b2g-bump