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

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https://hg.mozilla.org/integration/gaia-central/rev/a1a693a02e58
Author: gitmai <mri@tid.es>
Desc: Merge pull request #16815 from gitmai/bug-860718-CC-plot-line-jumps

Bug 860718 - Costcontrol plot line in graph jumps, small vertical gap be...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/dffb7aca14f4
Author: mai <mri@tid.es>
Desc: Bug 860718 - Costcontrol plot line in graph jumps, small vertical gap between consecutive parts
Bumping manifests a=b2g-bump