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

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https://hg.mozilla.org/integration/gaia-central/rev/5bdf1f9df4a9
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #19439 from evanxd/bug-1007546

Bug 1007546 - [Calendar] Add/Edit Event 2.0 Visual Refresh

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https://hg.mozilla.org/integration/gaia-central/rev/5ddd39bc6a7d
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 1007546 - Visual refresh for Add/Edit event view
Bumping manifests a=b2g-bump