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

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https://hg.mozilla.org/integration/gaia-central/rev/4da0704e5177
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #21778 from DouglasSherk/1035183-dialer-matched-numbers

Bug 1035183 - [Dialer] Make matched suggestions not appear when there are more than 50, remove + indicator. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/268ca25b95af
Author: DouglasSherk <github@sherk.me>
Desc: Bug 1035183 - [Dialer] Make matched suggestions not appear when there are more than 50, remove + indicator. r=Rik
Bumping manifests a=b2g-bump