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

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https://hg.mozilla.org/integration/gaia-central/rev/00fa531efc85
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #20867 from gaye/ochameau-marionette-with-custom-geckko

Bug 1019152 - Upgrade marionette-js-runner to 0.5.2 to pick up :ochameau work

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https://hg.mozilla.org/integration/gaia-central/rev/333acea5bd19
Author: gaye <gaye@mozilla.com>
Desc: Bug 1019152 - Upgrade marionette-js-runner to 0.5.2 to pick up :ochameau work
Bumping manifests a=b2g-bump