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

========

https://hg.mozilla.org/integration/gaia-central/rev/88beda7d1375
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #16160 from crdlc/bug-969170

Bug 969170 - [B2G][l10n]Buttons displayed in prompt after long pressing ...

========

https://hg.mozilla.org/integration/gaia-central/rev/305ef14f8c43
Author: crdlc <crdlc@tid.es>
Desc: Bug 969170 - [B2G][l10n]Buttons displayed in prompt after long pressing an E.Me search result is untranslated
Bumping manifests a=b2g-bump