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

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https://hg.mozilla.org/integration/gaia-1_4/rev/a027effe00e8
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #20872 from crh0716/1023044_v1.4

Bug 1023044 - Show the signal bar for a locked sim only when making emergency calls using the sim. r=alive

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https://hg.mozilla.org/integration/gaia-1_4/rev/01e1ddfdbcf5
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1023044 - Show the signal bar for a locked sim only when making emergency calls using the sim.
Bumping manifests a=b2g-bump