Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/849413c6be11
Author: lissyx <lissyx+github@lissyx.dyndns.org>
Desc: Merge pull request #17895 from lissyx/bug990998

Bug 990998 - Use correct object scope when calling _doSetRadioEnabled r=alive
Bumping manifests a=b2g-bump