org-mode: install site-start.d autoloads snippet

editors/org-mode/Portfile

@@ -5,6 +5,7 @@ PortGroup           elisp 1.0
 
 name                org-mode
 elpa.setup          org 9.8.6
+revision            1
 
 categories          editors
 license             GPL-3+
@@ -60,4 +61,8 @@ destroot {
     foreach f [glob -directory $srcdir *.info] {
         xinstall -m 0644 $f ${infodir}
     }
+
+    # Org ships its own org-loaddefs.el; install a site-start.d snippet so it
+    # is loaded at Emacs startup.
+    elisp.install_site_start_snippet ${destroot} org org-loaddefs
 }