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

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https://hg.mozilla.org/integration/gaia-central/rev/a01f15016dbe
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #12267 from pivanov/bug-908241

Bug 908241 - [SMS] Add attachment highlight state doesn't extend to the top edge

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https://hg.mozilla.org/integration/gaia-central/rev/ac06dcec05da
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 908241 - [SMS] Add attachment highlight state doesn't extend to the top edge