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

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https://hg.mozilla.org/integration/gaia-central/rev/9f88434e3a0e
Author: Yi-Fan Liao <begeeben@gmail.com>
Desc: Merge pull request #22387 from begeeben/1029944_switch_modaldialog_and_appmodaldialog

Bug 1029944 - Switch ModalDialog and AppModalDialog from using strings to using l10nIds, r= Zibi Braniecki [:gandalf]

* Replace mozL10n.get(l10nId) calls with node.setAttribute('data-l10n-id', l10nId) in ModalDialog and its use cases.
* Fix jshint errors.
* Update ModalDialog test.

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https://hg.mozilla.org/integration/gaia-central/rev/032c743be685
Author: Yi-Fan Liao <begeeben@gmail.com>
Desc: Bug 1029944 - Switch ModalDialog and AppModalDialog from using strings to using l10nIds

* Replace mozL10n.get(l10nId) calls with node.setAttribute('data-l10n-id', l10nId) in ModalDialog and its use cases.
* Fix jshint errors.
* Update ModalDialog test.
Bumping manifests a=b2g-bump