sigProcLib: introduce both TS1 and TS2 RACH synch. sequences

According to 3GPP TS 05.02, section 5.2.7, there are three
synch. sequences for Access Bursts:

  - TS0: GSM, GMSK (default),
  - TS1: EGPRS, 8-PSK,
  - TS2: EGPRS, GMSK.

Let's prepare everythyng to be able to detect all TS0-3 synch.
sequences, but keep detection of both TS1 and TS2 disabled
until the corresponding VTY option is introduced.

Change-Id: I838c21db29c54f1924dd478c2b34b46b70aab2cd
Related: OS#3054
diff --git a/GSM/GSMCommon.h b/GSM/GSMCommon.h
index 8b8d5e8..f703c30 100644
--- a/GSM/GSMCommon.h
+++ b/GSM/GSMCommon.h
@@ -52,7 +52,9 @@
 extern const BitVector gDummyBurst;
 
 /** Random access burst synch. sequence */
-extern const BitVector gRACHSynchSequence;
+extern const BitVector gRACHSynchSequenceTS0;
+extern const BitVector gRACHSynchSequenceTS1;
+extern const BitVector gRACHSynchSequenceTS2;
 /** Random access burst synch. sequence, GSM 05.02 5.2.7 */
 extern const BitVector gRACHBurst;