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

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https://hg.mozilla.org/integration/gaia-central/rev/e7679f24177b
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #25468 from DouglasSherk/1068104-system-call-screen-wakeup

Bug 1068104 - Wake up the screen when all calls are ended. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/73602d619b46
Author: Doug Sherk <github@sherk.me>
Desc: Bug 1068104 - Wake up the screen when all calls are ended. r=etienne
Bumping manifests a=b2g-bump