Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/efdeccdc6209
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #31566 from mwargers/1196358_disable

Bug 1196358 - Disable test_cleanup_gaia.py and test_power_button_long_press.py because of this bug

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https://hg.mozilla.org/integration/gaia-central/rev/e4f906515c3b
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1196358 - Disable test_cleanup_gaia.py and test_power_button_long_press.py because of this bug

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "ae6ec2b676d2170ac77daf86749e451547b07807", 
+        "git_revision": "628a4c4a0ca74fad7107883e1832527293e0575e", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "481550f4cf12fa63fde5cbe90f28ae638be8ca4d", 
+    "revision": "efdeccdc62099ed2a62e448a65133c399f5b9ab3", 
     "repo_path": "integration/gaia-central"
 }