Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/025bcb42e2ad
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1087788 - Status bar icons still overlapping with URL bar when geolocation icon is involved
Bumping manifests a=b2g-bump