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

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https://hg.mozilla.org/integration/gaia-central/rev/6c0f71a53255
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #18541 from dmarcos/bug996594

Bug 996594 - [Camera][Madai] Settings font size - The setting text is bi...

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https://hg.mozilla.org/integration/gaia-central/rev/44a65b9d002e
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 996594 - [Camera][Madai] Settings font size - The setting text is bigger than the list of values
Bumping manifests a=b2g-bump