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

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https://hg.mozilla.org/integration/gaia-central/rev/c349ef7fc9b4
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #25674 from gaye/reland-821604

Reland 821604

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https://hg.mozilla.org/integration/gaia-central/rev/c3777078af05
Author: gaye <gaye@mozilla.com>
Desc: Bug 821604 - Emit pause event after revoking alarm

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https://hg.mozilla.org/integration/gaia-central/rev/cb5d8c3fc43d
Author: gaye <gaye@mozilla.com>
Desc: Bug 821604 - Make sure we're augmenting the right chai with hasProperties

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https://hg.mozilla.org/integration/gaia-central/rev/0b7ce432debf
Author: gaye <gaye@mozilla.com>
Desc: Revert "Revert "Merge pull request #25420 from gaye/bug-821604" for Gu test failures"

This reverts commit eb8a140841f2fb2d8f28f45cbfd0bb053d8aa187.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "9898a7e766165dbee333f64442e58e00baebdf7e", 
+    "revision": "c349ef7fc9b4d343e5a3479c256471c3b2bd5284", 
     "repo_path": "/integration/gaia-central"
 }