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

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https://hg.mozilla.org/integration/gaia-central/rev/bf8bc38f28bd
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #25842 from rnowm/1053954

 	Bug 1053954 - [B2G][Flame][Settings][App permissions] There is no space below the Loop 'Uninstall app' button r=arthurchen

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https://hg.mozilla.org/integration/gaia-central/rev/d156d3aa21ae
Author: Arnau March <arnau@arnaumarch.com>
Desc: Bug 1053954 - [B2G][Flame][Settings][App permissions] There is no space below the Loop 'Uninstall app' button
Bumping manifests a=b2g-bump