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

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https://hg.mozilla.org/integration/gaia-central/rev/2c2f2fa0a101
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #21063 from zacc/bug_1005057_app_perms

LGTM, merging as the failure from Travis is unrelated to the changes.

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https://hg.mozilla.org/integration/gaia-central/rev/f132e488ea36
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1005057 - Switch to system frame inside get/set permission test methods

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https://hg.mozilla.org/integration/gaia-central/rev/3af7d2f1dc87
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #21100 from steveck-chung/bug-1021513

Bug 1021513 - [Messages] Recipients list container scroll up automatically when dragging down. r=azasypkin

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https://hg.mozilla.org/integration/gaia-central/rev/3d93cbb9fa5c
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1021513 - [Messages] Recipients list container scroll up automatically when dragging down the container for multiline recipients list mode
Bumping manifests a=b2g-bump