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

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https://hg.mozilla.org/integration/gaia-central/rev/f9ecda33f49c
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #17175 from ian-liu/bluetooth/bug981626_support_sharing_picture_and_video_simultaneously

Bug 981626 - [Sora][gallery]Can't be shared when select picture and video simultaneously, r=@dominickuo

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https://hg.mozilla.org/integration/gaia-central/rev/7c91fc678b71
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 981626 - [Sora][gallery]Can't be shared when select picture and video simultaneously
Bumping manifests a=b2g-bump