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

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https://hg.mozilla.org/integration/gaia-1_3/rev/38b5e7c78e4f
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #17320 from crdlc/bug-985132

Bug 985132 - [B2G][Homescreen]Input overlap with confirmation prompt whe...

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https://hg.mozilla.org/integration/gaia-1_3/rev/b6a97434304d
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #17535 from wanderview/contacts-canvas-cleanup-2

Bug 983885: Aggressively cleanup img/canvas in contacts. r=jmcf
Bumping manifests a=b2g-bump