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

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https://hg.mozilla.org/integration/gaia-central/rev/4a0216037684
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #31205 from julienw/1190151-run-make-node-modules

Bug 1190151 - [bin/gaia-test] Run "make node_modules" before running …

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https://hg.mozilla.org/integration/gaia-central/rev/ad5dae6bab74
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 1190151 - [bin/gaia-test] Run "make node_modules" before running the server r=ricky

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "1019c52bd5a29f7d9a23a61a15cedf7773bcfd2a", 
+        "git_revision": "8dba2077f5e7137253fbb3faf10cd0b5f7da25c2", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "cc37327ec6190138a6351836a15c26175cd3dafe", 
+    "revision": "4a0216037684d9f9299e8ca7470ca05c2ead4ab5", 
     "repo_path": "integration/gaia-central"
 }