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

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https://hg.mozilla.org/integration/gaia-central/rev/0e887d3364b0
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #18788 from zacc/bug_1003158

Bug 1003158 - gaiatest: update minimum required mozdevice version to 0.3...

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https://hg.mozilla.org/integration/gaia-central/rev/b92fed56a15f
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1003158 - gaiatest: update minimum required mozdevice version to 0.34 to use new logic
Bumping manifests a=b2g-bump