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

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https://hg.mozilla.org/integration/gaia-central/rev/d236713a913d
Author: gitmai <mri@tid.es>
Desc: Merge pull request #17429 from gitmai/bug-980861-balance-notification-without-sms

Bug 980861 -[Cost Control] Alarm should be notified when user configures...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/124fd49d5709
Author: mai <mri@tid.es>
Desc: Bug 980861 -[Cost Control] Alarm should be notified when user configures when use is above or when balance is below
Bumping manifests a=b2g-bump