Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/d2bb5c246ab3
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17446 from viorelaioia/unxfail_test

Bug 986462 - [v1.4] Unxfail test_dialer_find_contact as Bug 983054 is fixed

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https://hg.mozilla.org/integration/gaia-1_4/rev/1cca49dbb210
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 986462 - [v1.4] Unxfail test_dialer_find_contact as Bug 983054 is fixed
Bumping manifests a=b2g-bump