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

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https://hg.mozilla.org/integration/gaia-central/rev/ab7de80c4557
Author: Evan Tseng <itoyxd@gmail.com>
Desc: Merge pull request #25264 from evanxd/bug-1047283

Bug 1047283 - [Calendar] Drawer /Add event/ Display event should not play scrolling animation r=
millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/fafde2c3a084
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 1047283 - [Calendar] Drawer /Add event/ Display event should not play scrolling animation
Bumping manifests a=b2g-bump