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

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https://hg.mozilla.org/integration/gaia-central/rev/7f2f6573014c
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #17044 from DouglasSherk/dsds-calltext

Bug 980208 - [DSDS][Dialer] Display default SIM and long tap indicator on call button. r=Rik

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https://hg.mozilla.org/integration/gaia-central/rev/fb6eaad66782
Author: DouglasSherk <github@sherk.me>
Desc: Bug 980208 - [DSDS][Dialer] Display default SIM and long tap indicator on call button. r=Rik
Bumping manifests a=b2g-bump