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

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https://hg.mozilla.org/integration/gaia-central/rev/d0ed050535c3
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #16740 from Rik/tbpl-tests-failing-969280

Bug 978104 - Re-enable emergency-call/dialer_test.js r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/b2ebb8ec6ea2
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 978104 - Re-enable emergency-call/dialer_test.js
Bumping manifests a=b2g-bump