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

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https://hg.mozilla.org/integration/gaia-central/rev/152c7345a86d
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #20647 from EragonJ/bug-1020867

Bug 1020867 - Don't allow user to turn on wifi hotspot when airplane mod...

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https://hg.mozilla.org/integration/gaia-central/rev/d75f2cf0b235
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1020867 - Don't allow user to turn on wifi hotspot when airplane mode is enabled

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "3607c9c57bb0e7dedbc64f826b2d5be5a3ce25c2", 
+    "revision": "152c7345a86d0a6c002a733bbdf1a161475e4724", 
     "repo_path": "/integration/gaia-central"
 }