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

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https://hg.mozilla.org/integration/gaia-central/rev/d544276be9ed
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #16337 from dmarcos/bug972997

Bug 972136 - [Sora][Message][MMS]MS can't switch to message edit interfa...

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https://hg.mozilla.org/integration/gaia-central/rev/8fd94a878d1c
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 972136 - [Sora][Message][MMS]MS can't switch to message edit interface when share the photo to message..
Bumping manifests a=b2g-bump