Support meshcop datasets and propagation. (#330)

examples/platforms/posix/logging.c

@@ -107,6 +107,10 @@ void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion, const char *aFormat
     case kLogRegionNcp:
         fprintf(stderr, "NCP  ");
         break;
+
+    case kLogRegionMeshCoP:
+        fprintf(stderr, "MCOP ");
+        break;
     }
 
     va_start(args, aFormat);