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

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https://hg.mozilla.org/integration/gaia-central/rev/6d19fe34f810
Author: Scott Wu <scottwu@mozilla.com>
Desc: Merge pull request #32492 from scottwu/1214533-move-history-and-cookie-in-privacy

Bug 1214533 - Moves clear history and cookies buttons. Refactors conf…

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https://hg.mozilla.org/integration/gaia-central/rev/732c4d3ecae0
Author: Scott Wu <scottcwwu@gmail.com>
Desc: Bug 1214533 - Moves clear history and cookies buttons. Refactors confirm form with dialog service. Adds integration tests. r=gasolin

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https://hg.mozilla.org/integration/gaia-central/rev/f11483ffc93b
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #32440 from ferjm/bug1205292.disallow.sync.users

Bug 1205292 - Disallow new sync users. r=michielbdejong, yzen

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https://hg.mozilla.org/integration/gaia-central/rev/bdec6423a1bb
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Bug 1205292 - Disallow new sync users. r=michielbdjong, yzen

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "eca45a41ee722833ee95febdf8728287da7d1c82", 
+        "git_revision": "9cabc4ea55ba163bfb155b4ff889fac6d5ba9376", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "d3e937c04e3b25f59aedaae948e94badddddc889", 
+    "revision": "6d19fe34f81024dd1a9cc0f8e14521e0b8cc384d", 
     "repo_path": "integration/gaia-central"
 }