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

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https://hg.mozilla.org/integration/gaia-central/rev/403d81b0e428
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #12366 from jmcanterafonseca/bug__notknown

Bug 917287 - [Contacts] Name is not correctly shown when passively mergi...

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https://hg.mozilla.org/integration/gaia-central/rev/0cbf3e80180d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 917287 - [Contacts] Name is not correctly shown when passively merging a contact with a contact imported from SIM card

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https://hg.mozilla.org/integration/gaia-central/rev/d62dc7acab1f
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #12275 from alivedise/bugzilla/917435/mozbrowsericonchange

Bug 917435 - Use event.detail.href instead of event.detail in

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https://hg.mozilla.org/integration/gaia-central/rev/892b9f164bb1
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 917435 - Use event.detail.href instead of event.detail in
mozbrowsericonchange event handler

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https://hg.mozilla.org/integration/gaia-central/rev/c61a9006eca8
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Revert "Bug 919515 - Disable test_browser_search - Searching for words is not giving results"

This reverts commit 3452f8343128f21b6bce569575afa489c3414369.