Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/61075b75c71b
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #20071 from yurenju/timeout

Bug 1013585 - Intermittent gaia-build "Automation Error: mozprocess time... r=testonly

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https://hg.mozilla.org/integration/gaia-central/rev/fcb091e32ab5
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 1013585 - Intermittent gaia-build "Automation Error: mozprocess timed out after 330 seconds running ['make', 'build-test-integration', 'NPM_REGISTRY=http://npm-mirror.pub.build.mozilla.org', 'REPORTER=mocha-tbpl-reporter'] | timed out after 330 seconds of no output

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https://hg.mozilla.org/integration/gaia-central/rev/a5a6dd8d69a0
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 1020475 - App install progress indicator + test infra for packaged app states r=kgrandon
Bumping manifests a=b2g-bump