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

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https://hg.mozilla.org/integration/gaia-2_1/rev/0d320e617bcb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1066206 - [Search] When user tried to add a Rocketbar result to the homescreen the page opens silently in the background r=alive

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https://hg.mozilla.org/integration/gaia-2_1/rev/3712c7c9a18d
Author: mai <mri@tid.es>
Desc: Bug 1064507 - [Cost Control][Usage] Returning to the Usage app displays a blank screen on a device set to 319MB memory

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https://hg.mozilla.org/integration/gaia-2_1/rev/b38556394528
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1061331 - Dont persist meta application-name in browser. r=kgrandon

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https://hg.mozilla.org/integration/gaia-2_1/rev/2057c9f1c5e9
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1062694 - [NFC] prevent to set home visible if there is no active attention window

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https://hg.mozilla.org/integration/gaia-2_1/rev/81151621aab4
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 1061068 - [Contacts] ICE missing from top of the list when toggling the 'Order by last name' r=sergi

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https://hg.mozilla.org/integration/gaia-2_1/rev/325effcb558d
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 1059053 - [Messages][SMS] Icon in Message report is truncated
Bumping manifests a=b2g-bump