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

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https://hg.mozilla.org/integration/gaia-central/rev/d108bbdfe550
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #20366 from hfiguiere/Bug1023878

Bug 1023878 - make sure we stop if the make targets fail. r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/83a3b15ea18e
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1023878 - make sure we stop if the make targets fail.
Bumping manifests a=b2g-bump