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

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https://hg.mozilla.org/integration/gaia-central/rev/0a5c7375b5ad
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #23414 from Rik/handled-call-intermittent-1059108

Bug 1059108 - Use a MockAudioContext's in the AudioCompeting unit tests. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/42fa36c1d1cf
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 1059108 - Use a MockAudioContext's in the AudioCompeting unit tests.
Bumping manifests a=b2g-bump