Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/61bcc78df21f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17768 from KevinGrandon/bug_989306_ftu_doesnt_launch

Bug 989306 - First Time Use app fails to launch

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https://hg.mozilla.org/integration/gaia-central/rev/2e31fd26d284
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 989306 - Increase maxBuffer for Travis

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https://hg.mozilla.org/integration/gaia-central/rev/21ba76082b8d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 897352 - [gaia build system] Transition to a build_stage for assembling apps"

This reverts commit d17a39150f09378ed145be605857ff2254da516e.

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https://hg.mozilla.org/integration/gaia-central/rev/e948e79fdfef
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Merge pull request #16325 from guilherme-pg/findmydevice"

This reverts commit 2bbaa0d5a75c65dc30744c91b82f8cafc3406c53, reversing
changes made to 5e89c55e77eb7b5d29f7cca13a114e3b74ecdd30.

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https://hg.mozilla.org/integration/gaia-central/rev/d14a33eccdcf
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 885545 - Create Blobs for Contact photos in the VCF importer"

This reverts commit af9258e33cbc09ccbb154eced02ca970bd5be98e.
Bumping manifests a=b2g-bump