Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/bc88c0aa78e5
Author: DouglasSherk <github@sherk.me>
Desc: Bug 1008974 - [DSDS][Dialer] Queue taps and ignore long presses on MSAB until settings have been loaded. r=rik
Bumping manifests a=b2g-bump