Fix build of bsc-nat and GPRS code after include path change
The last patch changed the osmocore include paths, this fixes some build
problems caused by it
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_msc.c b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
index 530171e..135779e 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_msc.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
@@ -27,7 +27,7 @@
#include <openbsc/osmo_msc_data.h>
#include <openbsc/signal.h>
-#include <osmocom/core/gsm0808.h>
+#include <osmocom/gsm/gsm0808.h>
#include <osmocom/sccp/sccp.h>