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

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https://hg.mozilla.org/integration/gaia-central/rev/949542697c19
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1180236 - Disable browser_chrome_new_window_test.js

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https://hg.mozilla.org/integration/gaia-central/rev/31bee490f1ed
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #33610 from mikehenrty/bug-1192249-just-disable-it

Bug 1192249 - Disabling software_home_lockscreen_power_menu_test.js

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https://hg.mozilla.org/integration/gaia-central/rev/33311192649e
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1192249 - Disabling software_home_lockscreen_power_menu_test.js

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f6d1cca02eae20d6bc9a494960e7254b2730a2a9", 
+        "git_revision": "373a1ef64bca6f6454bb9b8af7f11fbf71dd37c8", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "670bb87fcd72314fd63a5728ea291b774e245ce7", 
+    "revision": "949542697c192eec00708700652e3ca6afe22df5", 
     "repo_path": "integration/gaia-central"
 }