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

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https://hg.mozilla.org/integration/gaia-central/rev/5377c33bc962
Author: Guillaume C. Marty <gmarty@users.noreply.github.com>
Desc: Merge pull request #25549 from gmarty/Bug-1089175-Utility-tray-3G-icon-has-misaligned-characters

Bug 1089175 - Utility tray 3G icon has misaligned characters

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https://hg.mozilla.org/integration/gaia-central/rev/274e6a932f98
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1089175 - Utility tray 3G icon has misaligned characters
Bumping manifests a=b2g-bump