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

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https://hg.mozilla.org/integration/gaia-central/rev/b1a91779e2d1
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #22130 from dmarcos/bug1043307

Bug 1043307 - Front camera image is rotated by 180 degree in landscape m...

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https://hg.mozilla.org/integration/gaia-central/rev/048932b4e72a
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 1043307 - Front camera image is rotated by 180 degree in landscape mode
Bumping manifests a=b2g-bump