Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/ac388cece64e
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #15400 from wilsonpage/bug/952164-v1.3

Bug 952164 - [B2G][Camera] Camera on lock screen allows user to take pic...

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https://hg.mozilla.org/integration/gaia-1_3/rev/70ddc23e912c
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 952164 - [B2G][Camera] Camera on lock screen allows user to take picture after clicking thumbnail preview despite no camera button being present