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

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https://hg.mozilla.org/integration/gaia-central/rev/dace5f5cc26e
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #24481 from DouglasSherk/1073534-callscreen-cancel

Bug 1073534 - Add "cancel" string to dialer. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/e9b0211ecc09
Author: Doug Sherk <github@sherk.me>
Desc: Bug 1073534 - Add "cancel" string to dialer. r=Rik
Bumping manifests a=b2g-bump