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

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https://hg.mozilla.org/integration/gaia-1_4/rev/8ed80dcd87c5
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #20108 from davidflanagan/bug1020273-v1.4

Bug1020273 v1.4

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https://hg.mozilla.org/integration/gaia-1_4/rev/5e49feeee377
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #20041 from davidflanagan/bug1020273

Bug 1020273: make the Gallery crop handles more sensitive r=pdahiya(cherry picked from commit a44346be68f23782d6b24426ed085d62856f9273)
Bumping manifests a=b2g-bump