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

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https://hg.mozilla.org/integration/gaia-central/rev/86c1b1d51b5b
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #25041 from millermedeiros/1074772-yahoo-recurring-all-day

Bug 1074772 - [Calendar] recurring all day events are not displayed for Yahoo accounts r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/3bf146f14188
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 1074772 - [Calendar] recurring all day events are not displayed for Yahoo accounts

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "162be54d45ece9196921eb2b342490ec2ab9e1a6", 
+    "revision": "86c1b1d51b5b442cc95277ab17e5e2842b2c2838", 
     "repo_path": "/integration/gaia-central"
 }