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

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https://hg.mozilla.org/integration/gaia-1_4/rev/684668097b7b
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #19821 from chirarobert/phone_number_v1.4

Bug 995187 - Call log is not showing the full phone number

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https://hg.mozilla.org/integration/gaia-1_4/rev/2cd01db2ec64
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 995187 - [1.4]Call log is not showing the full phone number
Bumping manifests a=b2g-bump