phobos.el: add autoload comments

phobos.el

@@ -50,6 +50,7 @@
     (shell-command (concat phobos-browser " " url))
     (message url)))
 
+;;;###autoload
 (defun phobos (symbol)
   "View the documentation on SYMBOL from the Phobos documentation.
 
@@ -62,6 +63,7 @@ information on Phobos and the D programming language, see <https://dlang.org>."
   (interactive "MModule or symbol: ")
   (phobos--visit "%s/%s.html" phobos-root (string-replace "." "/" symbol)))
 
+;;;###autoload
 (defun dub-doc (package &optional symbol)
   "View the documentation on SYMBOL from the dub package PACKAGE.
 
@@ -76,8 +78,10 @@ site hosted at <https://dpldocs.info>."
   (phobos--visit "https://%s.%s/%s.html"
                  package phobos-dpldocs-domain symbol))
 
+;;;###autoload
 (defalias 'view-dub-documentation 'dub-doc)
 
+;;;###autoload
 (defun describe-dub-package (package)
   "View the home page for dub package PACKAGE.