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

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https://hg.mozilla.org/integration/gaia-central/rev/217fd23018fc
Author: Yoshi Huang <allstars.chh@gmail.com>
Desc: Merge pull request #27659 from allstarschh/Bug1125700

Bug 1125700 - Test app for NFC event dispatch. r=timdream.

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https://hg.mozilla.org/integration/gaia-central/rev/d2865edb89ed
Author: Yoshi Huang <allstars.chh@mozilla.com>
Desc: Bug 1125700 - Test app for NFC event dispatch. r=timdream.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "ba613ae583a706131c45e885f65d428d4a541a81", 
+        "git_revision": "589641edabb557306654390216bad90a7ea96838", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "4705c493adb5c766382b27e4fbff42f7447900e9", 
+    "revision": "217fd23018fcc80a88d5b6baaa876ec688f3c886", 
     "repo_path": "integration/gaia-central"
 }