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

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https://hg.mozilla.org/integration/gaia-central/rev/714a3557e53a
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #19971 from gasolin/issue-1007066

Bug 1007066 - The permission prompt appears below the attention screen, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/cb4d9caef6c0
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1007066 - The permission prompt appears below the attention screen
Bumping manifests a=b2g-bump