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

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https://hg.mozilla.org/integration/gaia-central/rev/27b42f98665c
Author: EragonJ (E.J.) <eragonj@eragonj.me>
Desc: Merge pull request #25869 from EragonJ/bug-1073520

Bug 1073520 - Loading Wifi panel is ridiculously slow

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https://hg.mozilla.org/integration/gaia-central/rev/c42813421078
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1073520 - Loading Wifi panel is ridiculously slow
Bumping manifests a=b2g-bump