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

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https://hg.mozilla.org/integration/gaia-central/rev/a47f59ccb6ad
Author: Ricky Chien <rickychien@users.noreply.github.com>
Desc: Merge pull request #31843 from rickychien/b2g-43

Bug 1146713 - Upgrade to b2g 43.0a1 r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/4fcaf630ae2c
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1146713 - Upgrade to b2g 43.0a1

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "d284919f1a66fd057f25746f12f4b3db256ff033", 
+        "git_revision": "47f0ac6cf4c4525c342d052168153dd56b0039a7", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "5077ec10d5d92443e0600a5001e46994f6df9510", 
+    "revision": "a47f59ccb6ad5f296b6fd5ccf7572ecd1ec6ffc0", 
     "repo_path": "integration/gaia-central"
 }