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

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https://hg.mozilla.org/integration/gaia-central/rev/444fa63091ea
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #14743 from crdlc/bug-939524

Bug 939524 - Origin collision when installing and bookmarking the same a...

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https://hg.mozilla.org/integration/gaia-central/rev/ab1b79b19159
Author: crdlc <crdlc@tid.es>
Desc: Bug 939524 - Origin collision when installing and bookmarking the same app

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https://hg.mozilla.org/integration/gaia-central/rev/d9e24a46cf6c
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #14770 from crdlc/bug-796535

Bug 796535 - [l10n] dock icons are misaligned when using Arabic

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https://hg.mozilla.org/integration/gaia-central/rev/97901506cfdb
Author: crdlc <crdlc@tid.es>
Desc: Bug 796535 - [l10n] dock icons are misaligned when using Arabic