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

========

https://hg.mozilla.org/integration/gaia-central/rev/99bd00854d53
Author: Eli Perelman <eli@eliperelman.com>
Desc: Merge pull request #29639 from eliperelman/bug-1112119-metabits

Bug 1112119 - Removing legacy performance testing bits

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https://hg.mozilla.org/integration/gaia-central/rev/9573bc65add4
Author: Eli Perelman <eli@eliperelman.com>
Desc: Bug 1112119 - Removing legacy performance testing bits

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "fdc331adfa64d4dc7d2b2dfee8a8889388480d7b", 
+        "git_revision": "c16fdc3ce0c9562c2b3adc7ec7a39fb4d4bd18e6", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "0ef4fc9f01d07ccb78981af73dc5f8a9d8ad9d6a", 
+    "revision": "99bd00854d53768ba520bf12636ec953deac4e9e", 
     "repo_path": "integration/gaia-central"
 }