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

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https://hg.mozilla.org/integration/gaia-2_0/rev/53fb5b9408bd
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #22911 from crh0716/1054140

Bug 1054140 - Early return when navigating to the same panel r=eragonj

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https://hg.mozilla.org/integration/gaia-2_0/rev/d8f3d411ae2e
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #22811 from crh0716/1052557

Bug 1052557 - Remove the redundant href atribute r=eragonj
Bumping manifests a=b2g-bump