Bumping gaia.json for 3 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/c8917f89f9f4
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Merge pull request #11864 from gabrielesvelto/bug-887156-wappush-whitelist

Bug 887156 - Add a mechanism to filter WAP Push messages based on a whitelist of source MSISDNs r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/ba23b99b56ba
Author: Gabriele Svelto <gabriele.svelto@gmail.com>
Desc: Bug 887156 - Add a mechanism to filter WAP Push messages based on a whitelist of source MSISDNs r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/5e897a696b58
Author: b2gautomation <jonallengriffin@gmail.com>
Desc: Update gaia-ui-tests.json; Merge pull request #1351 from zacc/xfail_call_contact_914823

Xfail test_call_contacts with bug 914823
Bug 900880 - Remove unused system messages, r=echou