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

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https://hg.mozilla.org/integration/gaia-central/rev/05ce93944af3
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #25648 from zacc/bug_1091543

Bug 1091543 - Allow the gaia_apps.js getDisplayedApp atom to return acti...

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https://hg.mozilla.org/integration/gaia-central/rev/7acf8181002a
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1091543 - Allow the gaia_apps.js getDisplayedApp atom to return activityWindows launched by the search app r=bebe
Bumping manifests a=b2g-bump