Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/9d7731c8760a
Author: Greg Weng <snowmantw@gmail.com>
Desc: Revert "Merge pull request #31052 from snowmantw/bug1173284-rev3"

This reverts commit 8bc364b351531cfaaa033229ec2dd81d8e5ebe7d, reversing
changes made to e3e4cba7d400a0913bc247b0fd51a47dc9e4c5f3.

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https://hg.mozilla.org/integration/gaia-central/rev/2a83cdc27c64
Author: Greg Weng <snowmantw@gmail.com>
Desc: Merge pull request #31052 from snowmantw/bug1173284-rev3

Bug 1173284 - fix: sliding and unlocking wait for the mozSettings

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https://hg.mozilla.org/integration/gaia-central/rev/83582f3d0d52
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1173284 - fix: sliding and unlocking wait for the mozSettings

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "e3e4cba7d400a0913bc247b0fd51a47dc9e4c5f3", 
+        "git_revision": "4e1638e910f1657a9e940c99cb3421dbb71411e6", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "60f412291c7308efc6bb38c2838c29ac6ed10c27", 
+    "revision": "9d7731c8760ae9bd35da1f26238450cc87b98ac8", 
     "repo_path": "integration/gaia-central"
 }