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

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https://hg.mozilla.org/integration/gaia-central/rev/ac1ab1054e2a
Author: Zibi Braniecki <zbigniew.braniecki@gmail.com>
Desc: Merge pull request #23715 from zbraniecki/1062602-add-span-to-gaia-subheader

Bug 1062602 - gaia-subheader should have semantic structure for text. r=wilsonpage

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https://hg.mozilla.org/integration/gaia-central/rev/7955d1538481
Author: Zbigniew Braniecki <gandalf@mozilla.com>
Desc: Bug 1062602 - gaia-subheader should have semantic structure for text

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https://hg.mozilla.org/integration/gaia-central/rev/8107223dc29b
Author: Fernando Rodríguez Sela <frsela@tid.es>
Desc: Merge pull request #23454 from frsela/STK/Bug1059434

Bug 1059434 - STK display text command doesn't support time duration, r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/ca12ac30617b
Author: Fernando Rodriguez Sela <frsela@tid.es>
Desc: Bug 1059434 - STK display text command doesn't support time duration
Bumping manifests a=b2g-bump