Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/ed9aa15f09d6
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #17519 from crdlc/bug-986047

Bug 986047 - [B2G][Dialer]Cannot select Add Comment when creating a new ...

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https://hg.mozilla.org/integration/gaia-central/rev/d2e978b18a15
Author: crdlc <crdlc@tid.es>
Desc: Bug 986047 - [B2G][Dialer]Cannot select Add Comment when creating a new contact through the dialer app

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https://hg.mozilla.org/integration/gaia-central/rev/82d76e2bc50c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #17632 from jmcanterafonseca/fix_date_l10n

Bug 987966 - [contacts] placeholder for date fields in add/edit mode is ...

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https://hg.mozilla.org/integration/gaia-central/rev/ae2b21121627
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 987966 - [contacts] placeholder for date fields in add/edit mode is always in English: 'Date'

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "48000b91778cfa63803b6c480230283bd7512a60", 
+    "revision": "ed9aa15f09d6f67e80d516a1315cf08b7aab81e5", 
     "repo_path": "/integration/gaia-central"
 }