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

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https://hg.mozilla.org/integration/gaia-central/rev/38b847657ac4
Author: Scott Wu <scottwu@mozilla.com>
Desc: Merge pull request #33969 from scottwu/1131497-running-build-test-js-2

Bug 1131497 - Converted build test scripts to run on node.js, r=rickychien

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https://hg.mozilla.org/integration/gaia-central/rev/4f001892cead
Author: Scott Wu <scottcwwu@gmail.com>
Desc: Bug 1131497 - Converted build test scripts to run on node.js

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "cd8f75c5d30aa85d7d1c2d0ca54a817021ab9e10", 
+        "git_revision": "9819a191640d45379eaeacf9ace353fb7d169e67", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "3b40b8c038594b3502cce8a6a13a48694f6da825", 
+    "revision": "38b847657ac47b3ee59ebeb5772524a357127309", 
     "repo_path": "integration/gaia-central"
 }