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

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https://hg.mozilla.org/integration/gaia-central/rev/707b58970f26
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #23039 from yzen/bug-1054964

Bug 1054964 - updated a selector (now independent of markup order) for t...

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https://hg.mozilla.org/integration/gaia-central/rev/7fdf53c58b16
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1054964 - updated a selector (now independent of markup order) for the small text in the wifi list item entry.
Bumping manifests a=b2g-bump