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

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https://hg.mozilla.org/integration/gaia-central/rev/fbaec0070f91
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #13809 from qba73/keyboard

Adding url keyboard test

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https://hg.mozilla.org/integration/gaia-central/rev/ceed3ab95a77
Author: Jakub Jarosz <jakub.s.jarosz@gmail.com>
Desc: Adding url keyboard test

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "7fa01badf5afb29cd847fb3817d8e745bba628aa", 
+    "revision": "fbaec0070f9174a658b081fe2e44b5e50591a1db", 
     "repo_path": "/integration/gaia-central"
 }