Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/1e0008939bf4
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #19359 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/a6e704307932
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 1007546 - Visual refresh for Add/Edit event view

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https://hg.mozilla.org/integration/gaia-central/rev/3bbb91d22493
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #19347 from hfiguiere/bug971771

Bug 971771 - Remove camera from blacklist now. r=eperelman

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https://hg.mozilla.org/integration/gaia-central/rev/f74b31f0f6e2
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 971771 - Remove camera from blacklist now.
Bumping manifests a=b2g-bump