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

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https://hg.mozilla.org/integration/gaia-central/rev/c7a466417e5e
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #26120 from JohanLorenzo/bug-1098279

Bug 1098279 - Add -dsds to existing Jenkins jobs

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https://hg.mozilla.org/integration/gaia-central/rev/87687919cab4
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1098279 - Add -dsds to existing Jenkins jobs

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https://hg.mozilla.org/integration/gaia-central/rev/8faf5b5c6d81
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #25811 from albertopq/1087116-alert-scrollable

Bug 1087116 - make alerts scrollable r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/6d62ff53f943
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1087116 - make alerts scrollable
Bumping manifests a=b2g-bump