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

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https://hg.mozilla.org/integration/gaia-1_4/rev/a94de932c69d
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #19409 from dmarcos/bug995540

Bug 995540 - [Sora][camera]video recording would not stop instantly when...

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https://hg.mozilla.org/integration/gaia-1_4/rev/fd47c3e3bff1
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 995540 - [Sora][camera]video recording would not stop instantly when coming a call or alarm
Bumping manifests a=b2g-bump