Bug 1244859 - Remove trailing slash in telemetry urls. r=mfinkle r=mfinkle

It was not to-spec (though it doesn't appear to have an effect on how the
server reads the data).

--HG--
extra : commitid : HCMuUF8yNPG
extra : rebase_source : 47f4daeefd21d1524a6a814d0500ae5621a68dcd

mobile/android/base/java/org/mozilla/gecko/telemetry/TelemetryPingGenerator.java

@@ -51,7 +51,7 @@ public class TelemetryPingGenerator {
                 appName + '/' +
                 appVersion + '/' +
                 appUpdateChannel + '/' +
-                appBuildId + '/';
+                appBuildId;
     }
 
     /**