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

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https://hg.mozilla.org/integration/gaia-central/rev/b6408d2d9046
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #11254 from nullaus/market-customizations

Market customizations helper object and base test case

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https://hg.mozilla.org/integration/gaia-central/rev/95614e3fffab
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 892153

Create Operator Variant Helper and base tests for Market Customization work. Object enables customization of settings and other application data on first SIM insertion AND during SIM changes at runtime if so desired.

r=timdream, julienw

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https://hg.mozilla.org/integration/gaia-central/rev/8ebf016ddc47
Author: Jonathan Griffin <jgriffin@mozilla.com>
Desc: Merge pull request #11410 from jonallengriffin/902641

Bug 902641 - Disable contacts_list_test.js for frequent TBPL orange, a=t...

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https://hg.mozilla.org/integration/gaia-central/rev/5b3a5f923cb9
Author: Jonathan Griffin <jgriffin@mozilla.com>
Desc: Bug 902641 - Disable contacts_list_test.js for frequent TBPL orange, a=test-only