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

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https://hg.mozilla.org/integration/gaia-central/rev/d51abf675098
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #24890 from viorelaioia/bug_1077333

Bug 1077333 - Investigate failure in test_add_to_new_contact_from_messages.py

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https://hg.mozilla.org/integration/gaia-central/rev/858f9d37c4b4
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1077333 - Investigate failure in test_add_to_new_contact_from_messages.py

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https://hg.mozilla.org/integration/gaia-central/rev/f086e95b9670
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24874 from jmcanterafonseca/fix_settings_animation

Bug 1055685 - Contacts settings screen animates in too slowly

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https://hg.mozilla.org/integration/gaia-central/rev/214c396d64cd
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1055685 - Contacts settings screen animates in too slowly
Bumping manifests a=b2g-bump