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

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https://hg.mozilla.org/integration/gaia-central/rev/7091c4f8f99b
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #14654 from arcturus/bug-944572

Bug 944572 - [DSDS] Even if SIM card is in slot 1 which is SIM2, import and export function of Contacts app will still show SIM1 in the list.

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https://hg.mozilla.org/integration/gaia-central/rev/7c307828090f
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 944572 - [DSDS] Even if SIM card is in slot 1 which is SIM2, import and export function of Contacts app will still show SIM1 in the list.