Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/51f657455f57
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1089006 - [Collection] nonTranslatable property is not saved in home screen r=Cwiiis

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https://hg.mozilla.org/integration/gaia-2_1/rev/63f8245bc6a0
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Bug 1091295 - [email] normalize newlines in composer. r=jrburke

land https://github.com/mozilla-b2g/gaia-email-libs-and-more/pull/352

Failure to normalize newlines in composed messages. May cause some SMTP servers
(ex: qmail) to refuse to send mail with a 451 error.

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https://hg.mozilla.org/integration/gaia-2_1/rev/f88f20e3629d
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1095310: correctly detect BMP files that are larger than 64kb

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https://hg.mozilla.org/integration/gaia-2_1/rev/db4424d01088
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1094105 - email not correctly calculating y click when images not loaded in message reader

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https://hg.mozilla.org/integration/gaia-2_1/rev/717c50485852
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1085212: release video hardware before sharing and restore when done

Followup fix for bug 1088456: use playerShowing instead of playing so the patch works even if we are paused

address review comments

Conflicts:
	apps/video/js/video.js

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https://hg.mozilla.org/integration/gaia-2_1/rev/fdd1b3cac9bb
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1084224 - [Midori 2.0][Contacts][Facebook]keep logging out interface always when clickX
Bumping manifests a=b2g-bump