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

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https://hg.mozilla.org/integration/gaia-central/rev/38b4f6e058e9
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #22046 from KevinGrandon/bug_1011274_sms_test_timeout

Bug 1011274 - Intermittent utils_test.js | Utils Utils.getResizedImgBlob "before all" hook | timeout of 5000ms exceeded r=julien

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https://hg.mozilla.org/integration/gaia-central/rev/38ca5e65d161
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1011274 - Intermittent utils_test.js | Utils Utils.getResizedImgBlob "before all" hook | timeout of 5000ms exceeded
Bumping manifests a=b2g-bump