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_nat/bsc_filter.c b/openbsc/src/osmo-bsc_nat/bsc_filter.c
index 5765a66..74a5d19 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_filter.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_filter.c
@@ -26,7 +26,7 @@
#include <openbsc/debug.h>
#include <osmocom/core/talloc.h>
-#include <osmocom/core/protocol/gsm_08_08.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
#include <osmocom/sccp/sccp.h>