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

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https://hg.mozilla.org/integration/gaia-central/rev/72013ef0318f
Author: Ben Francis <ben@tola.me.uk>
Desc: Merge pull request #22848 from benfrancis/1053416

Bug 1053416 - Increase size of reload button r=cwiiis

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https://hg.mozilla.org/integration/gaia-central/rev/004eaaf80a3c
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 1053416 - Increase size of reload button

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https://hg.mozilla.org/integration/gaia-central/rev/72f6a8f55257
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #22499 from pivanov/bug-1037146

The "show password" check box in the wifi connection details page in the FTU app is cut off on the right edge in RTL mode and label is cut off too

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https://hg.mozilla.org/integration/gaia-central/rev/0c1a285fca92
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: The "show password" check box in the wifi connection details page in the FTU app is cut off on the right edge in RTL mode and label is cut off too

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "a7a129e7b9cbeb2ae4508148402367e39c4d4492", 
+    "revision": "72013ef0318fab1b633559f3a9d8d6b4c56b95c8", 
     "repo_path": "/integration/gaia-central"
 }