Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/3d6d56327779
Author: crdlc <crdlc@tid.es>
Desc: Bug 1068826 - [Flame][KK]Upon booting for first time, there are extra processes in the memory, possbly slowing the performance

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https://hg.mozilla.org/integration/gaia-2_1/rev/9c95261cf0fb
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1065877: prevent OOMs when editing, picking and sharing large images

address review comments

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https://hg.mozilla.org/integration/gaia-2_1/rev/63786b9780cd
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1062998 - Update signal icons when showing SIM Manager

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https://hg.mozilla.org/integration/gaia-2_1/rev/de09d67a3069
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Bug 1064228 - Make settings api test functions wait on transaction

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https://hg.mozilla.org/integration/gaia-2_1/rev/d43fe097008a
Author: Ted Clancy (:tedders1) <tclancy@mozilla.com>
Desc: Bug-1063624: Only call UIManager.tzInit once. r=fcampo
Bumping manifests a=b2g-bump