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

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https://hg.mozilla.org/integration/gaia-central/rev/185e13e2cbcc
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #20171 from svic/mozillaorg

Bug 1020005: Send 'shrinking-stop' instead of 'shrinking-reject' event w...

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https://hg.mozilla.org/integration/gaia-central/rev/ec4158122896
Author: Siddartha Pothapragada <Siddartha.Pothapragada@telekom.com>
Desc: Bug 1020005: Send 'shrinking-stop' instead of 'shrinking-reject' event whenever 'techLost' event happens.
Also modified respective test case in nfc_manager_test.js. r=gweng

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https://hg.mozilla.org/integration/gaia-central/rev/5f528701acbe
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #19289 from rsajdok/bug#875159b

Bug 875159: Wrong message is displayed when no Gmail contacts are availa...

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https://hg.mozilla.org/integration/gaia-central/rev/87427648fe12
Author: Robert Sajdok <robert.sajdok@gmail.com>
Desc: Bug 875159: Wrong message is displayed when no Gmail contacts are available to import

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https://hg.mozilla.org/integration/gaia-central/rev/7ea4044f54e6
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #20455 from julienw/1018035-cursor-hidden-activity

Bug 1018035 - [Flame][v1.4][SMS]No cursor display when tap the message e...

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https://hg.mozilla.org/integration/gaia-central/rev/866156edd34a
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1018035 - [Flame][v1.4][SMS]No cursor display when tap the message edit box.  r=azasypkin
Bumping manifests a=b2g-bump