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

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https://hg.mozilla.org/integration/gaia-central/rev/edd5d9ac5106
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #15576 from hfiguiere/bug959138

Bug 959138 - Fix the perf event test reporting. r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/3abd95d870e1
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 959138 - Fix the perf event test reporting.
Bumping manifests a=b2g-bump