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

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https://hg.mozilla.org/integration/gaia-central/rev/19b3a63a63a2
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #19232 from crdlc/bug-1004989

Bug 1004989 - [Homescreen] The downloading animation is not properly around the downloading icon

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https://hg.mozilla.org/integration/gaia-central/rev/0379fbb81138
Author: crdlc <crdlc@tid.es>
Desc: Bug 1004989 - [Homescreen] The downloading animation is not properly around the downloading icon

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "4393a8d719e7917f543cd8d906632c9b2164198e", 
+    "revision": "19b3a63a63a23395e8609ac1182a9620c129c9ad", 
     "repo_path": "/integration/gaia-central"
 }