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

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https://hg.mozilla.org/integration/gaia-central/rev/a34bf76749e0
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Merge pull request #16226 from qdot/971371-remove-integration-directories

Bug 971371 - Remove all test/integration directories from gaia

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https://hg.mozilla.org/integration/gaia-central/rev/62e4433a9670
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Bug 971371 - Remove all test/integration directories from gaia

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https://hg.mozilla.org/integration/gaia-central/rev/1408e11d0a6b
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #16253 from pmclanahan/send-language-to-basket-964342

Bug 964342: Send language setting to basket.

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https://hg.mozilla.org/integration/gaia-central/rev/36502b1786d8
Author: Paul McLanahan <pmac@mozilla.com>
Desc: Bug 964342: Send language setting to basket.

* Add error codes to basket client.
* Use error code for invalid email instead of looking for a message.
* Add timeout handling for call to basket.

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https://hg.mozilla.org/integration/gaia-central/rev/bdaf20232456
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #15669 from MBRSL/bug-963445-API

Bug 963445 - [UITest][API] refactor tests using Building Blocks

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https://hg.mozilla.org/integration/gaia-central/rev/c9a8471e7d20
Author: Tom Jao <tjao@mozilla.com>
Desc: Bug 963445 - [UITest][API] refactor tests using Building Blocks
Bumping manifests a=b2g-bump