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

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https://hg.mozilla.org/integration/gaia-2_0/rev/7202974f89cf
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #26714 from zacc/bug_1044484_v2.0

Bug 1044484 - Add an external tag to gaiatest manifests to denote tests ...

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https://hg.mozilla.org/integration/gaia-2_0/rev/195bb1d190aa
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1044484 - Add an external tag to gaiatest manifests to denote tests use of external internet resources
Bumping manifests a=b2g-bump