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

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https://hg.mozilla.org/integration/gaia-central/rev/70e90e3e0b8f
Author: Sam Foster <sam@sam-i-am.com>
Desc: Merge pull request #24721 from sfoster/noskip-ftu-bug-1070058

Bug 1070058 - Create child/dialog windows when FTU is running. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/2d3ee5a7e0d9
Author: Sam Foster <sfoster@mozilla.com>
Desc: Bug 1070058 - Create child/dialog windows when FTU is running. r=alive
Bumping manifests a=b2g-bump