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

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https://hg.mozilla.org/integration/gaia-central/rev/1e1ffec09757
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #14253 from MBRSL/bug-943784-radio

Bug 943784 - [UITest][HW] remove 'var navigator = window.navigator' in r..., r=gasolin

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https://hg.mozilla.org/integration/gaia-central/rev/1aa27a60bb53
Author: Tom Jao <tjao@mozilla.com>
Desc: Bug 943784 - [UITest][HW] remove 'var navigator = window.navigator' in radio test

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "44fa8d35437871899bc18fe46e3dbe20569171a0", 
+    "revision": "1e1ffec09757bf0090f5ab2c29011ae83fb3cdb8", 
     "repo_path": "/integration/gaia-central"
 }