Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/bc139e32e85a
Author: John Ford <john@johnford.info>
Desc: Stop messaging #gaia

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https://hg.mozilla.org/integration/gaia-central/rev/9ce038a08794
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #22514 from psingapati/Bug_1048798_Open_Attachment_FileName

Bug 1048798 - [Email] Gallery open activity is expecting attachment imag... r=jrburke

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https://hg.mozilla.org/integration/gaia-central/rev/0af5f458f91e
Author: praveen.singapati <praveen.singapati@lge.com>
Desc: Bug 1048798 - [Email] Gallery open activity is expecting attachment image filename in the data

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https://hg.mozilla.org/integration/gaia-central/rev/c7ccc8bef496
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #22539 from nullaus/bug1047609

bug 1047609 - Land 60x60 version of new System App icon. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/8677d06e4ebf
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 1047609 - Land 60x60 version of new System App icon. r=kgrandon
Bumping manifests a=b2g-bump