Update emacs-snapshot to 24.0.90.20111012.

Changes:
* mail/sendmail.el: Don't use sendmail-query-once if not needed.
* progmodes/f90.el: Ignore preprocessor lines, like
  f90-previous-statement does.
* eshell/eshell.el: History should be saved only in interactive use,
  to avoid error.
* bindings.el ([M-left],[M-right]): Bind to left-word and right-word
  respectively.
* progmodes/gdb-mi.el (gdb): Doc fix.

(minskim)