Support matching to account for telcos inserting SMS prefixes.

// FREEBIE

Fixes #1944

src/org/thoughtcrime/securesms/service/SmsListener.java

@@ -128,7 +128,7 @@ public class SmsListener extends BroadcastReceiver {
     if (messageBody == null)
       return false;
 
-    if (messageBody.matches("Your TextSecure verification code: [0-9]{3,4}-[0-9]{3,4}") &&
+    if (messageBody.matches(".*Your TextSecure verification code: [0-9]{3,4}-[0-9]{3,4}") &&
         TextSecurePreferences.isVerifying(context))
     {
       return true;