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

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https://hg.mozilla.org/integration/gaia-central/rev/1ec19fae52f3
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #26856 from Cwiiis/bug1112594-fix-cut-off-neterror

Bug 1112594 - Fix sometimes cut-off net-error page. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/1a565e588473
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1112594 - Fix sometimes cut-off net-error page. r=alive
Bumping manifests a=b2g-bump