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

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https://hg.mozilla.org/integration/gaia-central/rev/427d1f8a0aad
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #26133 from steveck-chung/message-text-selection

Bug 1092437 - Messages app should follow text selection pattern, r=azasypkin

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https://hg.mozilla.org/integration/gaia-central/rev/0330e510fa27
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1092437 - Messages app should follow text selection pattern, r=azasypkin
Bumping manifests a=b2g-bump