Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/7a6ab71457a0
Author: Jared Hirsch <ohai@6a68.net>
Desc: Merge pull request #21087 from 6a68/bug-1030597-blank-fmd-settings-panel

Bug 1030597 - Always show some find my device panel by default. r=arthur...

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https://hg.mozilla.org/integration/gaia-2_0/rev/68c5e785f71e
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #20687 from RudyLu/keyboard/Bug1023164-Shift_key_style

Bug 1023164 - [Keyboard] Shift Key for Caps Visual improvement.
r=timdream.

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https://hg.mozilla.org/integration/gaia-2_0/rev/ac9d04cc61b5
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #20232 from jmcanterafonseca/fix_import_sim_dups_2

Bug 1021548 - Importing second time from SIM card yields to errors in th...
Bumping manifests a=b2g-bump