Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/535352d00053
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #19041 from punamdahiya/Bug1006919

Bug1006919- [Gallery] Remove work around to generate and pass file backed blob for pick activity in gallery.js r=djf

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https://hg.mozilla.org/integration/gaia-1_4/rev/ff4fb1749267
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #19517 from jrburke/bug1014278-email-nomail-overlap

Bug 1014278 - [B2G][E-mail]'No mail in this Folder' text overlaps email in Local Drafts folder r=asuth

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https://hg.mozilla.org/integration/gaia-1_4/rev/4e7cbf0f8b02
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #19232 from crdlc/bug-1004989

Bug 1004989 - [Homescreen] The downloading animation is not properly around the downloading icon
Bumping manifests a=b2g-bump