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

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https://hg.mozilla.org/integration/gaia-1_4/rev/8042ec26a634
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #20534 from snowmantw/issue1018364-v1.4

Bug 1018364 - Orientation locked while resuming device

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https://hg.mozilla.org/integration/gaia-1_4/rev/a674d135611a
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1018364 - Orientation locked while resuming device
Bumping manifests a=b2g-bump