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

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https://hg.mozilla.org/integration/gaia-central/rev/79e25f81e1e8
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #14492 from chuck-lee/bug-947810_show_wap_push_auth_info

Bug 947810 - Show authentication information in WAP-Push test app. r=arthurcc

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https://hg.mozilla.org/integration/gaia-central/rev/90d86e8fe8f7
Author: Chuck Lee <chulee@mozilla.com>
Desc: Bug 947810 - Show authentication information in WAP-Push test app. r=arthurcc