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

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https://hg.mozilla.org/integration/gaia-1_4/rev/9579c320190a
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #21531 from comoyo/fast-contacts-startup

Bug 1006331 - Cache contacts above the fold in localStorage, so we can render them instant on app startup

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https://hg.mozilla.org/integration/gaia-1_4/rev/a55a3e3bef21
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 1006331 - Cache contacts above the fold in localStorage, so we can render them instant on app startup
Bumping manifests a=b2g-bump