Sync with verilog-mode development tree.

Sync with verilog-mode development tree.

* lisp/progmodes/verilog-mode.el (verilog-imenu-generic-expression,
verilog-speedbar-initialize): Automatically add verilog-mode
extensions when in speedbar mode, bug1045, bug1046.  Reported by
David Shleifman.
(verilog-mode-map): Move `verilog-star-comment' from M-* to C-c/ to
avoid conflict with `pop-tag-mark'. Reported by Ian Perryman.
(verilog-read-always-signals-recurse): Fix :: notation for
auto-reset signals.  Reported by Andrew Jones.
(verilog-font-lock-grouping-keywords-face): Fix highlighting of
grouping keywords, bug1002. Reported by Paul Sargent.
(verilog-save-font-no-change-functions): Commentary and fix
pre-Emacs 21 behavior.