host: Always initialize libosmocore logging before using it

This avoids related ASSERTs or error messages in case any of the
libosmocore / libosmousb API functions internally tries to log
something.

Change-Id: I611c435516856c5c8928d7810fd9a9b831adc199

host/src/simtrace2-tool.c

@@ -290,6 +290,8 @@ int main(int argc, char **argv)
 
 	transp->udp_fd = -1;
 
+	print_welcome();
+
 	osmo_init_logging2(NULL, &log_info);
 
 	rc = osmo_libusb_init(NULL);
@@ -298,8 +300,6 @@ int main(int argc, char **argv)
 		goto do_exit;
 	}
 
-	print_welcome();
-
 	do {
 		if (transp->udp_fd < 0) {
 			struct usb_interface_match _ifm, *ifm = &_ifm;