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

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https://hg.mozilla.org/integration/gaia-central/rev/10891073b838
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #19009 from cctuan/997491

Bug 997491 - build-test-integration doesn't honor REPORTER

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https://hg.mozilla.org/integration/gaia-central/rev/feeaed81bfe7
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 997491 - build-test-integration doesn't honor REPORTER
Bumping manifests a=b2g-bump