Fix compilation warning on deprecated macro

A warning was printed even if the deprecation didn't apply to
libosmocore because it is still allowed to use it internally.
This patch fixes this case while still printing a warning if external
projects build using libosmocore headers.

Change-Id: I32212f20756f828af1017482a71e29e4b3adbad4
diff --git a/include/osmocom/core/logging.h b/include/osmocom/core/logging.h
index 77343e9..7af0ad2 100644
--- a/include/osmocom/core/logging.h
+++ b/include/osmocom/core/logging.h
@@ -332,8 +332,8 @@
 void log_del_target(struct log_target *target);
 
 /* Generate command string for VTY use */
-const char *log_vty_command_string() OSMO_DEPRECATED("For internal use inside libosmocore only.");
-const char *log_vty_command_description() OSMO_DEPRECATED("For internal use inside libosmocore only.");
+const char *log_vty_command_string() OSMO_DEPRECATED_OUTSIDE_LIBOSMOCORE;
+const char *log_vty_command_description() OSMO_DEPRECATED_OUTSIDE_LIBOSMOCORE;
 
 struct log_target *log_target_find(int type, const char *fname);
 extern struct llist_head osmo_log_target_list;