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

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https://hg.mozilla.org/integration/gaia-central/rev/cd93f87eb1d2
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #20692 from AndreiH/bug_1027050

Bug 1027050 - [v2.1] Change cost_control button locators

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https://hg.mozilla.org/integration/gaia-central/rev/2afe21b22f4a
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1027050 - [v2.1] Change cost_control button locators
Bumping manifests a=b2g-bump