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

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https://hg.mozilla.org/integration/gaia-central/rev/4f49c8b1299e
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24171 from jmcanterafonseca/set_ice_only_phone_number

Bug 1068814 - [Contacts] Setting ICE contact with only a phone number do...

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https://hg.mozilla.org/integration/gaia-central/rev/0faf90814b4d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1068814 - [Contacts] Setting ICE contact with only a phone number does not show on ICE contacts settings screen

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https://hg.mozilla.org/integration/gaia-central/rev/0bccba17598c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24136 from jmcanterafonseca/fix_comments_form

Bug 1068098 - [Contacts] Deleting a comment on a contact causes all othe...

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https://hg.mozilla.org/integration/gaia-central/rev/a2e2f5bd629c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1068098 - [Contacts] Deleting a comment on a contact causes all other comments to disappear on edit screen
Bumping manifests a=b2g-bump