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

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https://hg.mozilla.org/integration/gaia-central/rev/fae1a0c2fe5e
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #14630 from snowmantw/issue948789

Bug 948789 - Lockscreen can be unlocked without using normal gestures

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https://hg.mozilla.org/integration/gaia-central/rev/9390b461e7e9
Author: Greg Weng (snowmantw) <gweng@mozilla.com>
Desc: Bug 948789 - Lockscreen can be unlocked without using normal gestures