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

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https://hg.mozilla.org/integration/gaia-central/rev/d2c08aa4d028
Author: Albert <acperez@tid.es>
Desc: Merge pull request #16622 from acperez/bug-975989

Bug 975989 - Add build customization for Network Display Indicator by SIM. r=yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/93ddd3d8b7f5
Author: Albert <acperez@tid.es>
Desc: Bug 975989 - Add build customization for Network Display Indicator by SIM. r=yurenju
Bumping manifests a=b2g-bump