Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/9ed9f6afeeec
Author: DouglasSherk <github@sherk.me>
Desc: Bug 985888 - [DSDS] Display currently in-use SIM cards on call buttons. r=rik

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https://hg.mozilla.org/integration/gaia-1_4/rev/f0eb4a9d769b
Author: DouglasSherk <github@sherk.me>
Desc: Bug 987024 - [DSDS] Cache ril.xxx.defaultServiceId in MSAB to avoid IO thrashing. Fixed after being backed out in bug 980982. r=Rik, francisco

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https://hg.mozilla.org/integration/gaia-1_4/rev/ef45ad7fc9c1
Author: DouglasSherk <github@sherk.me>
Desc: Revert "Bug 985888 - [DSDS] Display currently in-use SIM cards on call buttons. r=rik"

This reverts commit 1606cc3008ff06e146c070a60e70a1c074552304.
Bumping manifests a=b2g-bump