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

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https://hg.mozilla.org/integration/gaia-central/rev/608b18f6b4eb
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #24199 from snowmantw/issue1065262

Bug 1065262 - [Lockscreen] No action is triggered on notification in loc...

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https://hg.mozilla.org/integration/gaia-central/rev/bafb1447a8ab
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1065262 - [Lockscreen] No action is triggered on notification in lock screen with passcode enabled

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "729f7f9da5e7bcf557e66b06e4acff0e9ed56869", 
+    "revision": "608b18f6b4eb3b19e5001fd4ef18211ff41460bb", 
     "repo_path": "/integration/gaia-central"
 }