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

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https://hg.mozilla.org/integration/gaia-central/rev/677a789e57dc
Author: gitmai <mri@tid.es>
Desc: Merge pull request #18982 from gitmai/bug-1006404-css-done-button

Bug 1006404 -[Cost control] Done button css rules

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https://hg.mozilla.org/integration/gaia-central/rev/32cdf0b0afc8
Author: mai <mri@tid.es>
Desc: Bug 1006404 -[Cost control] Done button css rules

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https://hg.mozilla.org/integration/gaia-central/rev/c9a895254933
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #18955 from svic/Bug_1006032

Bug 1006032 - Choose better identifiers for l10n resources

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https://hg.mozilla.org/integration/gaia-central/rev/0b69f05e1355
Author: Arno Puder <arno@puder.org>
Desc: Bug 1006032 - Choose better identifiers for l10n resources. r=alive
Bumping manifests a=b2g-bump