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

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https://hg.mozilla.org/integration/gaia-central/rev/07248dd06c34
Author: gitmai <mri@tid.es>
Desc: Merge pull request #15298 from gitmai/bug-949798-No-data-limit-input-data-alert

Bug 949798 - [B2G][Cost Control]No limit for input text field for Data A...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/33862cb46879
Author: mai <mri@tid.es>
Desc: Bug 949798 - [B2G][Cost Control]No limit for input text field for Data Alert

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https://hg.mozilla.org/integration/gaia-central/rev/a279036f52c4
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #15454 from vingtetun/bug959425

Bug 959425 - [B2G][Notification Bar] Data Usage Bar allows touch events ...

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https://hg.mozilla.org/integration/gaia-central/rev/586575b84a02
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 959425 - [B2G][Notification Bar] Data Usage Bar allows touch events behind it. r=alive
Bumping manifests a=b2g-bump