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

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https://hg.mozilla.org/integration/gaia-central/rev/d19c27fb6208
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #12777 from lightsofapollo/more-recent-b2g

Bug 919882 - Use latest mozilla-central b2g build on travis

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https://hg.mozilla.org/integration/gaia-central/rev/676e8d3488cb
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 919882 - Use latest mozilla-central b2g build on travis
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5aca6284801d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #12800 from gaye/bump-marionette-apps

Bump marionette-apps to ~0.3.1 r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/c26bdfdef8e9
Author: Gareth Aye <gaye@mozilla.com>
Desc: Bump marionette-apps to ~0.3.1
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/d10b41974fe0
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #12409 from davidflanagan/bug878057

Bug 878057: allow songs to be picked as ringtones

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https://hg.mozilla.org/integration/gaia-central/rev/24d64e46a9a2
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 878057: allow songs to be picked as ringtones
Merge m-c to b2g-inbound
No bug, Automated HSTS preload list update from host bld-linux64-ec2-391 - a=hsts-update
Merge b2g-inbound to m-c.
Merge inbound to m-c.
Merge m-c to inbound.