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

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https://hg.mozilla.org/integration/gaia-1_4/rev/a72fe15f26fc
Author: lissyx <lissyx+github@lissyx.dyndns.org>
Desc: Merge pull request #19810 from lissyx/bug1017103

Bug 1017103 - Display no data radio technology when in airplane mode r=timdream
Bumping manifests a=b2g-bump