Log Message:
Update emacs-snapshot to 24.0.92.20111213.

Changes:
        * progmodes/make-mode.el: Bring it up to date with makepp V2.0.
        * ses.el: The overall change is to add cell renaming, that is
        setting fancy names for cell symbols other than name matching
        "\\`[A-Z]+[0-9]+\\'" regexp .
        * progmodes/gdb-mi.el (gdb): Set comint-prompt-regexp, required
        for completion via gud-gdb-fetch-lines-filter (Bug#10274).
        * mail/rmailsum.el (rmail-header-summary): RFC2047 decode the
        `from' or `to' address before taking its substring.  Fixes
        incorrect display in Rmail summary buffer whereby an RFC2047
        encoded name is chopped in the middle of the encoded string, and
        thus displayed encoded.
        * speedbar.el (speedbar-supported-extension-expressions):
        Add .adb and .ads, commonly used for Ada source code (bug#10256).