Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/9df8c99149fd
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #29289 from ian-liu/bluetooth/bug1132345_handle_BluetoothPairingEvent_interface_changed

Bug 1132345 - Handle ondisplaypasskeyreq/onpairingconsentreq events and pairing event interface changed, r=arthur

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https://hg.mozilla.org/integration/gaia-central/rev/b759ed193b7c
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 1132345 - Handle ondisplaypasskeyreq/onpairingconsentreq events and pairing event interface changed, r=arthur

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https://hg.mozilla.org/integration/gaia-central/rev/3a58868a733d
Author: Sherman Chen <shamenchens@users.noreply.github.com>
Desc: Merge pull request #29447 from shamenchens/Bug1152711-JshintMocks

Bug 1152711 - Fix jshint error in unit test mocks, r=gduan

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https://hg.mozilla.org/integration/gaia-central/rev/82c8666717f7
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1152711 - Fix jshint error in unit test mocks

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "43f67fb074c326286bdb15b31749b0905d427558", 
+        "git_revision": "baaf1020a5af69855a41e4755035f131c9b444e2", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "6b934ba8010f97da833911efa89b805454a6f0fb", 
+    "revision": "9df8c99149fdafa23600ecb6ecc26480e559a315", 
     "repo_path": "integration/gaia-central"
 }