Bumping gaia.json for 4 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/d380fc789f83
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #11640 from etiennesegonzac/bug-906775-dynamic-handled-calls-nodes

Bug 906769 - Dynamically create handled call dom nodes.

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https://hg.mozilla.org/integration/gaia-central/rev/30fd586be5e5
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 906769 - Dynamically create handled call dom nodes.
r=rik

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https://hg.mozilla.org/integration/gaia-central/rev/e19baa90237c
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #11722 from arcturus/bug-907692

Bug 907692 - [Contacts] transforming to vcard should provide a blob

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https://hg.mozilla.org/integration/gaia-central/rev/ebf4d070b371
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 907692 - [Contacts] transforming to vcard should provide a blob