EDGE: Add random burst generator filler option

When EDGE is enabled with the '-e' option, the random burst generator
switches from GMSK normal bursts to 8-PSK EDGE bursts.

  $ ./osmo-trx -e -r 7

Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
diff --git a/Transceiver52M/Transceiver.h b/Transceiver52M/Transceiver.h
index fa58053..79b487a 100644
--- a/Transceiver52M/Transceiver.h
+++ b/Transceiver52M/Transceiver.h
@@ -154,7 +154,8 @@
   enum FillerType {
     FILLER_DUMMY,
     FILLER_ZERO,
-    FILLER_RAND,
+    FILLER_NORM_RAND,
+    FILLER_EDGE_RAND,
   };
 
 private: