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

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https://hg.mozilla.org/integration/gaia-central/rev/ebdeab7ec302
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #12467 from EragonJ/bug-914362

Bug 914362 - fix long device name problem

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https://hg.mozilla.org/integration/gaia-central/rev/8d688a8a338b
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 914362 - fix long device name problem

- add middle ellipsis symbols for this case

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "3ff89cdffb8308bbd4354ef11fb63c10b8a9d743", 
+    "revision": "ebdeab7ec30216c8d290d2dbd5661719cfca10ff", 
     "repo_path": "/integration/gaia-central"
 }