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

========

https://hg.mozilla.org/integration/gaia-central/rev/5053fecfe57e
Author: Michael Vines <mvines@codeaurora.org>
Desc: Merge pull request #16458 from mvines/bug962177

Bug 962177 - Ignore .git/ when packaging webapps. r=yurenju

========

https://hg.mozilla.org/integration/gaia-central/rev/1ed7b4e0ff1c
Author: Michael Vines <mvines@codeaurora.org>
Desc: Bug 962177 - Ignore .git/ when packaging webapps

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "7c8b471791f72d23aa8253c119b6eaa777ab642f", 
+    "revision": "5053fecfe57e93c8e71b4f32f34f6810e0d70d09", 
     "repo_path": "/integration/gaia-central"
 }