Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/ff828a871db2
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #24817 from comoyo/revert1073870

Revert "Bug 1073870 - Autocorrect word does not get cleared when moving the cursor around"

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https://hg.mozilla.org/integration/gaia-central/rev/afb7ec51b92d
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Revert "Bug 1073870 - Autocorrect word does not get cleared when moving the cursor around"

This reverts commit 4551093ae6ca06fa8c6a41c90328b75097a90a4c.

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https://hg.mozilla.org/integration/gaia-central/rev/2ab388600d30
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #24811 from comoyo/bug1073870

Bug 1073870 - Autocorrect word does not get cleared when moving the cursor around. r=RudyL

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https://hg.mozilla.org/integration/gaia-central/rev/bb3d3bfb3cd9
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 1073870 - Autocorrect word does not get cleared when moving the cursor around

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https://hg.mozilla.org/integration/gaia-central/rev/2eb4bcf52e5a
Author: pacorampas <b.frv@tid.es>
Desc: Merge pull request #24652 from pacorampas/1074847

Bug 1074847 - [BB] layout BB example does not scroll r=arnau

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https://hg.mozilla.org/integration/gaia-central/rev/6e77dcd6dae5
Author: Paco Rampas <pacorampas@gmail.com>
Desc: Bug 977588 - [Dialer] The Active call screen does not have the option to place calls on hold.
Bumping manifests a=b2g-bump