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

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https://hg.mozilla.org/integration/gaia-central/rev/2b64acc6eba7
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #19906 from azasypkin/bug-1017018-to-localize

Bug 1017018 - [Messages] Bug 963018 regresses the localizability of the "To:" string in the recipient panel. "To" and "Menu" blocks were made non-shrinkable. r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/c0e1d9c93f83
Author: Aleh Zasypkin <azasypkin@mozilla.com>
Desc: Bug 1017018 - [Messages] Bug 963018 regresses the localizability of the "To:" string in the recipient panel. "To" and "Menu" blocks were made non-shrinkable. r=schung
Bumping manifests a=b2g-bump