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

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https://hg.mozilla.org/integration/gaia-central/rev/b7e1c391ebb3
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #25918 from huchengtw-moz/bug-1095325-send-create-while-restart

Bug 1095325 - [Stingray] app window sends "create" event while restart, r=rexboy

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https://hg.mozilla.org/integration/gaia-central/rev/440c893d3ac4
Author: John Hu <johu@mozilla.com>
Desc: Bug 1095325 - [Stingray] app window sends "create" event while restart
Bumping manifests a=b2g-bump