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

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https://hg.mozilla.org/integration/gaia-central/rev/7edf914c58bb
Author: Sam Joch <samuel@guiora.com>
Desc: Merge pull request #13988 from samjoch/bug-942098-HomescreenUpdateDockAndAppIconDropShadows

Bug 942098 - [Homescreen] Update Dock and App Icon drop shadows r=21

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https://hg.mozilla.org/integration/gaia-central/rev/b763ae0f0cfc
Author: Sam Joch <samuel@guiora.com>
Desc: Bug 942098 - [Homescreen] Update Dock and App Icon drop shadows
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/da99b63fe2f2
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #14056 from nth10sd/bug939976

Bug 939976 - JavascriptException: TypeError: invalid 'in' operand voice lockscreen.js

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https://hg.mozilla.org/integration/gaia-central/rev/bf978b35e922
Author: Gary Kwong <gary@rumblingedge.com>
Desc: Bug 939976 - JavascriptException: TypeError: invalid 'in' operand voice lockscreen.js, r=vingtetun
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/79fdd326f7c0
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #13981 from pivanov/bug-939209

Bug 939209 - [Action Icons - Email] Remove shadows from action icons

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https://hg.mozilla.org/integration/gaia-central/rev/b978e893868a
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 939209 - [Action Icons - Email] Remove shadows from action icons