Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/2745c4ce2fc1
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #10605 from crdlc/bug-886602

Bug 886602 - Several homescreen dragdrop tests fail in TBPL

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https://hg.mozilla.org/integration/gaia-central/rev/fbb2865bcfe5
Author: crdlc <crdlc@tid.es>
Desc: Bug 886602 - Several homescreen dragdrop tests fail in TBPL