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

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https://hg.mozilla.org/integration/gaia-central/rev/60bdb671218a
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #23608 from cctuan/1060230

Bug 1060230 - CopyPaste Tip overlap with Date/Time Selector

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https://hg.mozilla.org/integration/gaia-central/rev/4b1cea797114
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1060230 - ignore selectionchange when value selector dialog is displaying

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https://hg.mozilla.org/integration/gaia-central/rev/c49f0010e08a
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #23310 from mancas/bug972663

Bug 972663 - [B2G] [Settings]: Data Roaming setting is not disabled when...

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https://hg.mozilla.org/integration/gaia-central/rev/87f41f27a7a1
Author: Manuel Casas Barrado <manuel.casasbarrado@telefonica.com>
Desc: Bug 972663 - [B2G] [Settings]: Data Roaming setting is not disabled when the Data Connection setting is disabled on a roaming SIM
Bumping manifests a=b2g-bump