split libgb into a separate library for outside use
This also removes the dependency to osmo_sock() inside libcommon and
replaces it with osmo_sock_* from libosmocore
diff --git a/openbsc/src/gprs/gb_proxy_main.c b/openbsc/src/gprs/gb_proxy_main.c
index 0bfc6cf..5791dab 100644
--- a/openbsc/src/gprs/gb_proxy_main.c
+++ b/openbsc/src/gprs/gb_proxy_main.c
@@ -37,10 +37,11 @@
#include <osmocom/core/select.h>
#include <osmocom/core/rate_ctr.h>
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/gprs/gprs_bssgp.h>
+
#include <openbsc/signal.h>
#include <openbsc/debug.h>
-#include <openbsc/gprs_ns.h>
-#include <openbsc/gprs_bssgp.h>
#include <openbsc/vty.h>
#include <openbsc/gb_proxy.h>