stats: Add wrapper for vec_free

The result vector from stat_segment_ls must be freed
by the caller. Add wrapper for non-C language bindings.

Change-Id: I7eee7f80ec98b41696d354add47b26978e12ef0f
Signed-off-by: Ole Troan <ot@cisco.com>
diff --git a/src/vpp-api/client/stat_client.c b/src/vpp-api/client/stat_client.c
index 1c099edc..0042a2b 100644
--- a/src/vpp-api/client/stat_client.c
+++ b/src/vpp-api/client/stat_client.c
@@ -364,6 +364,12 @@
   return vec_len (vec);
 }
 
+void
+stat_segment_vec_free (void *vec)
+{
+  vec_free (vec);
+}
+
 /* Create a vector from a string (or add to existing) */
 u8 **
 stat_segment_string_vector (u8 ** string_vector, char *string)