Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/839002671e3e
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #19555 from wilsonpage/1010995

Bug 1010995 - Create gaia-drawer web component

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https://hg.mozilla.org/integration/gaia-central/rev/051a3ce31124
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1010995 - Create gaia-drawer web component

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https://hg.mozilla.org/integration/gaia-central/rev/5997e8de18d7
Author: Albert <acperez@tid.es>
Desc: Merge pull request #19730 from acperez/bug-1017042

Default APN for undefined types added in the wrong file

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https://hg.mozilla.org/integration/gaia-central/rev/e924e67d7663
Author: Albert <acperez@tid.es>
Desc: Default APN for undefined types added in the wrong file
Bumping manifests a=b2g-bump