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

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https://hg.mozilla.org/integration/gaia-central/rev/36a9133407ad
Author: Albert <acperez@tid.es>
Desc: Merge pull request #12327 from acperez/customization_structure

Bug 917740 - Update file format of customization files based on MCC/MNC r=amac,salva,yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/06b3087641b5
Author: Albert <acperez@tid.es>
Desc: Bug 917740 - Update file format of customization files based on MCC/MNC r=amac,salva,yurenju