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

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https://hg.mozilla.org/integration/gaia-central/rev/67fc4a72469c
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #22302 from evelynhung/issue-997564

bug 997564 - add a call path for engineering mode in Gaia. r=anthony

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https://hg.mozilla.org/integration/gaia-central/rev/01237cdd32b6
Author: Evelyn Hung <jj.evelyn@gmail.com>
Desc: bug 997564 - add a call path for engineering mode in Gaia
Bumping manifests a=b2g-bump