bug#13445: add2rline usage in manual

[Glenn Morris]

Package: emacs
Version: 24.2.92
Severity: minor

trouble.texi says:

  If your system has the @command{addr2line} utility, the following shell
  command outputs a backtrace with source-code line numbers:

  @example
  sed -n 's/.*\[\(.*\)]$/\1/p' @var{backtrace} |
    addr2line -Cfip -e @var{bindir}/emacs
  @end example


Trying this on RHEL6 fails with:

   addr2line: invalid option -- 'p'

By experiment, -Cfi works.

I can't see anywhere in the addr2line manual or info page on this system
that explains what demangling styles are valid.


GNU addr2line version 2.20.51.0.2-5.34.el6 20100205