Fix duplicate binary API registration messages / bugs

Changed vat_api_hookup(...) to <plugin-name>_api_hookup, change to
static functions. Fixed the related emacs-lisp plugin skeleton.

Change-Id: Id14f8fc3138751f469d48fecb26175e938f5f028
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/build-root/emacs-lisp/plugin-test-skel.el b/build-root/emacs-lisp/plugin-test-skel.el
index 2f8121a..837cbda 100644
--- a/build-root/emacs-lisp/plugin-test-skel.el
+++ b/build-root/emacs-lisp/plugin-test-skel.el
@@ -158,7 +158,7 @@
 #define foreach_vpe_api_msg \\
 _(" plugin-name "_enable_disable, \"<intfc> [disable]\")
 
-void vat_api_hookup (vat_main_t *vam)
+static void " plugin-name "_api_hookup (vat_main_t *vam)
 {
     " plugin-name "_test_main_t * sm = &" plugin-name "_test_main;
     /* Hook up handlers for replies from the data plane plug-in */
@@ -196,7 +196,7 @@
   sm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name);
 
   if (sm->msg_id_base != (u16) ~0)
-    vat_api_hookup (vam);
+    " plugin-name "_api_hookup (vam);
   
   vec_free(name);