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

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https://hg.mozilla.org/integration/gaia-2_1/rev/7abd6cc24e81
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1077022 - [Keyboard] European Portuguese (pt-PT) based keyboard is missing.
r=rudylu
a=2.1+, fabrice.
Bumping manifests a=b2g-bump