Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5f23f25eb8a0
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17080 from chirarobert/skip_clock_app

Bug 982134 - Skip test_clock_set_alarm.py with Bug 982128

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https://hg.mozilla.org/integration/gaia-central/rev/a487a8035353
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 982134 - Skip test_clock_set_alarm.py with Bug 982128

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https://hg.mozilla.org/integration/gaia-central/rev/affea58483ac
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17076 from zacc/bug_982048_xfail

Bug 982048 - Xfail test_email_keyboard.py with bug 982113

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https://hg.mozilla.org/integration/gaia-central/rev/515d9d178cf5
Author: zac <zac@zac-ThinkPad-X1-Carbon.(none)>
Desc: Bug 982048 - Xfail test_email_keyboard.py with bug 982113
Bumping manifests a=b2g-bump