sigProcLib: Add operator<< to print CorrType to a string.

Change-Id: I3d68cbdab8fb504d7f155029654a576d318a201e
diff --git a/Transceiver52M/sigProcLib.h b/Transceiver52M/sigProcLib.h
index 04c4757..4f2c13e 100644
--- a/Transceiver52M/sigProcLib.h
+++ b/Transceiver52M/sigProcLib.h
@@ -41,6 +41,8 @@
   EDGE,        ///< timeslot should contain an EDGE burst
   IDLE         ///< timeslot is an idle (or dummy) burst
 };
+std::string corrTypeToString(CorrType corr);
+std::ostream& operator<<(std::ostream& os, CorrType corr);
 
 enum SignalError {
   SIGERR_NONE,