Fix version string in Python setup (#3976)

Author: sauwming

pjsip-apps/src/swig/python/setup.py

@@ -63,7 +63,7 @@
 if pj_version_rev:
     pj_version += "." + pj_version_rev
 if pj_version_suffix:
-    pj_version += "-" + pj_version_suffix
+    pj_version += pj_version_suffix
 
 #print 'PJ_VERSION = "'+ pj_version + '"'