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

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https://hg.mozilla.org/integration/gaia-1_4/rev/7b17c7e24f94
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #22684 from aniruddha-adhikary/v1.4

Bug 1029934 - User cannot input Rupee symbol

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https://hg.mozilla.org/integration/gaia-1_4/rev/881d03cb1ecb
Author: Aniruddha Adhikary <aniruddha@adhikary.net>
Desc: Bug 1029934 - User cannot input Rupee symbol
Bumping manifests a=b2g-bump