Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/2344d600fc81
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #19574 from jrburke/bug1010701-email-multi-attach-lmk

Bug 1010701 - [Tarako][Email][LMK] Email gets killed when attach multiple files to a mail r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/5be930fc2321
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1010701 - [Tarako][Email][LMK] Email gets killed when attach multiple files to a mail

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https://hg.mozilla.org/integration/gaia-central/rev/724bf028440e
Author: gasolin <gasolin@gmail.com>
Desc: Revert "Merge pull request #18767 from gasolin/issue-973445"

This reverts commit bc203f87fe03416a4c5cd7aacef65642f8200899, reversing
changes made to ecd2547a626408307aea7cf83ad7aa237f7c8835.
Bumping manifests a=b2g-bump