FPII-122: Fix FairphoneUpdater crash

Merge upstream FairphoneUpdater code, which fixes crashes
due to missing crashlytics integration.

Change-Id: Ic12da7a777b176c146b090b36ccc03759275f3b7
diff --git a/res/values/config.xml b/res/values/config.xml
index bcdc0ed..660e150 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <string name="downloadUrl" translatable="false">http://www.fairphone.com/ota/</string>
+    <string name="downloadUrl" translatable="false">http://ota.fairphone.com/</string>
     <string name="configFilename" translatable="false">updater</string>
     <string name="config_zip" translatable="false">.zip</string>
 	<string name="config_xml" translatable="false">.xml</string>