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

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https://hg.mozilla.org/integration/gaia-central/rev/1d5c6b3eb0c5
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1121858 - merge pull request #28179 from Cwiiis:bug1121858-only-toggle-should-toggle to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/f9e27b56aedd
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1121858 - Only toggle expand/collapse when tapping arrow. r=kgrandon

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f217a93f31b23c1e6a98eeabfde7214d6de447e2", 
+        "git_revision": "bb543b9f19b1d977f26bbaf81c0f37a39d2b2e7b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "0d3cfb60cbd61192bd795fec5227d2ae6c61adf9", 
+    "revision": "1d5c6b3eb0c513fffb536ed35f1cef73f011fa45", 
     "repo_path": "integration/gaia-central"
 }