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

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https://hg.mozilla.org/integration/gaia-1_4/rev/9e32f50bee68
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #18229 from viorelaioia/bug_994644_v1.4

Bug 994644 - [master] test_that_device_info_is_populated in failing on C...

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https://hg.mozilla.org/integration/gaia-1_4/rev/3c5ba1bf3cdc
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 994644 - [master] test_that_device_info_is_populated in failing on CI
Bumping manifests a=b2g-bump