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

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https://hg.mozilla.org/integration/gaia-central/rev/9021c39e76b7
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #23947 from viorelaioia/bug_1065995

Bug 1065995 - Disable tests affected by Bug 1064228

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https://hg.mozilla.org/integration/gaia-central/rev/e513ab828845
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1065995 - Disable tests affected by Bug 1064228
Bumping manifests a=b2g-bump