gtphub: logging: have one newline per log.

Some logging was multiline to ease human reading of debug output. However,
in the VTY output, these newlines lack a CR motion. Split multiline logs into
separate lines.

Also add one missing space.

Sponsored-by: On-Waves ehi
diff --git a/openbsc/src/gprs/gtphub_sock.c b/openbsc/src/gprs/gtphub_sock.c
index 6ea1735..699672e 100644
--- a/openbsc/src/gprs/gtphub_sock.c
+++ b/openbsc/src/gprs/gtphub_sock.c
@@ -50,7 +50,7 @@
 		LOG(LOGL_ERROR, "sent(%d) != data_len(%d)\n",
 		    (int)sent, (int)buf_len);
 	else
-		LOG(LOGL_DEBUG, "Sent %d\n%s\n",
+		LOG(LOGL_DEBUG, "Sent %d: %s\n",
 		    (int)sent, osmo_hexdump(buf, sent));
 
 	return 0;