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

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https://hg.mozilla.org/integration/gaia-central/rev/2dbae05f4189
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #18036 from wilsonpage/992912

Bug 992912 - [Camera] HDR indicator icon too small

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https://hg.mozilla.org/integration/gaia-central/rev/f5da881f7b08
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 992912 - [Camera] HDR indicator icon too small
Bumping manifests a=b2g-bump