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

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https://hg.mozilla.org/integration/gaia-central/rev/ad4544d4d921
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #33914 from mwargers/1240153

Bug 1240153 - test_settings_media_storage.py : Fix AssertionError

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https://hg.mozilla.org/integration/gaia-central/rev/bcbce0b47d5f
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1240153 - test_settings_media_storage.py : Fix AssertionError

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "e3aa3c0b04df0d7db654ccf3fee2d4342600d668", 
+        "git_revision": "bd018cc12722be3e3706d27913ee63f74e2483a4", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "6b5ef5ad5ebcb82cc28dedf610c8b2d32cfc5111", 
+    "revision": "ad4544d4d92170c5e362fd4b76750c767db72bbe", 
     "repo_path": "integration/gaia-central"
 }