Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/2dde90c8368f
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #15639 from crdlc/bug-960659

Bug 960659 - [B2G][e.me] Add to Home Screen notification does not appear...

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https://hg.mozilla.org/integration/gaia-1_3/rev/246337165cf8
Author: crdlc <crdlc@tid.es>
Desc: Bug 960659 - [B2G][e.me] Add to Home Screen notification does not appear when long pressing on an e.me app after searching