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

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https://hg.mozilla.org/integration/gaia-central/rev/4c3cf4d40f5e
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #17537 from DouglasSherk/987024-contacts-bustage

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-central/rev/a022e25a73b8
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
Bumping manifests a=b2g-bump