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

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https://hg.mozilla.org/integration/gaia-central/rev/b633ac1c4970
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17188 from chirarobert/xfail_test_sms_to_dialer

Bug 983585 - Xfail test_sms_to_dialer with Bug 983070

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https://hg.mozilla.org/integration/gaia-central/rev/a1add141fba6
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 983585 - Xfail test_sms_to_dialer with Bug 983070

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https://hg.mozilla.org/integration/gaia-central/rev/fc8a1898b5d7
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17187 from chirarobert/unxfail_keyboard_test

Bug 983584 - Unxfail test_email_keyboard because Bug 982113 was resolved

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https://hg.mozilla.org/integration/gaia-central/rev/2b49155925e4
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 983584 - Unxfail test_email_keyboard because Bug 982113 was resolved
Bumping manifests a=b2g-bump