Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/dd2969e38c1c
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #12892 from comoyo/value_selector_inputcontext

Bug 924893 - Use contextchange chrome event instead of mozKeyboard.onfocuschange in value selector. r=RudyL

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https://hg.mozilla.org/integration/gaia-central/rev/45bd4b3f6421
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 924893 - Use contextchange chrome event instead of mozKeyboard.onfocuschange in value selector