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

========

https://hg.mozilla.org/integration/gaia-central/rev/d5db104074da
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #18900 from tauzen/Bug1000981

Bug 1000981 - [NFC] NfcManager handleNdefMessage tests, NfcUtils tests moved to separate file, r=alive

========

https://hg.mozilla.org/integration/gaia-central/rev/0b9cd698f317
Author: Krzysztof Mioduszewski <kmioduszewski@gmail.com>
Desc: Bug 1000981 - [NFC] NfcManager handleNdefMessage tests, NfcUtils tests moved to separate file

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "e262f052f525471d7030a0451674a9c43aaa6de6", 
+    "revision": "d5db104074da412e503d7bb77750709c7ef4cb00", 
     "repo_path": "/integration/gaia-central"
 }