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

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https://hg.mozilla.org/integration/gaia-central/rev/c39deb36272f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17538 from KevinGrandon/bug_987282_jshint_options

Bug 987282 - JSHint allow getter without setter globally r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/c5385eb6122b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 987282 - JSHint allow getter without setter globally r=julienw
Bumping manifests a=b2g-bump