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/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c
index 43aa212..7fd8641 100644
--- a/openbsc/src/gprs/gprs_gmm.c
+++ b/openbsc/src/gprs/gprs_gmm.c
@@ -32,8 +32,8 @@
#include <openbsc/db.h>
#include <osmocom/core/msgb.h>
-#include <osmocom/core/tlv.h>
-#include <osmocom/core/gsm_utils.h>
+#include <osmocom/gsm/tlv.h>
+#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/core/signal.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/rate_ctr.h>