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

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https://hg.mozilla.org/integration/gaia-central/rev/49f9ad6e9229
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #16022 from sashakruglov/bug965771

Bug 965771 - validate RTL locale support in gaia-ui tests; r=zacc

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https://hg.mozilla.org/integration/gaia-central/rev/bc42b5a543db
Author: Sasha Kruglov <sashakruglov@hotmail.com>
Desc: Bug 965771 - validate RTL locale support in gaia-ui tests; r=zacc
Bumping manifests a=b2g-bump