=== Split osmo-gbproxy from osmo-sgsn ===

Adjust the build system, packaging etc. to split osmo-gbproxy into its
own git repository. Remove tests and configs that aren't related to
osmo-gbproxy.

Related: OS#4992
diff --git a/src/gb_proxy_ctrl.c b/src/gb_proxy_ctrl.c
index 4561634..794afd7 100644
--- a/src/gb_proxy_ctrl.c
+++ b/src/gb_proxy_ctrl.c
@@ -29,7 +29,8 @@
 #include <osmocom/ctrl/control_if.h>
 #include <osmocom/ctrl/control_cmd.h>
 #include <osmocom/sgsn/gb_proxy.h>
-#include <osmocom/sgsn/debug.h>
+
+#include "debug.h"
 
 extern vector ctrl_node_vec;