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

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https://hg.mozilla.org/integration/gaia-central/rev/670bb87fcd72
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Merge pull request #33605 from JohanLorenzo/bug-1230099

Bug 1230099 - Delete tests already ported to Gij - round #2

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https://hg.mozilla.org/integration/gaia-central/rev/437631e3f8f6
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1230099 - Delete tests already ported to Gij - round #2

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "b52024cc12cd41803350c66171a6da37516e33b7", 
+        "git_revision": "f6d1cca02eae20d6bc9a494960e7254b2730a2a9", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "57cb027dfaee7c5b9bfaf23b8001ee8e8ce7d663", 
+    "revision": "670bb87fcd72314fd63a5728ea291b774e245ce7", 
     "repo_path": "integration/gaia-central"
 }