Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b04eea7a2d68
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #19331 from hfiguiere/bug837669

Bug 837669 - ready test-perf in setting, r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/cf36659fd504
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 837669 - Part 2: startup-path-done performance event for settings

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https://hg.mozilla.org/integration/gaia-central/rev/cc4e2389a368
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 837669 - Part 1: Rename the "start" perf event for the wifi list test.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "75527514ec03f8fb210bb4edf6663af1bdc1420b", 
+    "revision": "b04eea7a2d682c1e51f908423ba9e24d17c6f8c9", 
     "repo_path": "/integration/gaia-central"
 }