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

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https://hg.mozilla.org/integration/gaia-central/rev/741865b887d0
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17120 from KevinGrandon/bug_980984_dialer_ringer_follow_up

Bug 980984 - Follow-up, remove unused DialerComms mock

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https://hg.mozilla.org/integration/gaia-central/rev/b465435b98c6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 980984 - Follow-up, remove unused DialerComms mock r=me
Bumping manifests a=b2g-bump