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

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https://hg.mozilla.org/integration/gaia-central/rev/1c4cb5110391
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #17977 from AndreiH/bug_991782

Bug 991782 - Fix test_sms_to_dialer.py failure

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https://hg.mozilla.org/integration/gaia-central/rev/27c200e7a333
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 991782 - Fix test_sms_to_dialer.py failure
Bumping manifests a=b2g-bump