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

========

https://hg.mozilla.org/integration/gaia-central/rev/8f93511b5989
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #21335 from pivanov/bug-1020531

Bug 1020531 - All of the strings in the tutorial are left-aligned in RTL locales

========

https://hg.mozilla.org/integration/gaia-central/rev/7a3175f7e18e
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1020531 - All of the strings in the tutorial are left-aligned in RTL locales

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "dd04ca4b91cdb034a4b90a924b14cd066677b05b", 
+    "revision": "8f93511b5989eda6d5b90fcb18bafc380edae3ed", 
     "repo_path": "/integration/gaia-central"
 }