cmd/pprof: never use c++filt
The copy of c++filt shipped on OS X is six years old,
and in our case it does far more mangling than it
does demangling. People on non-OS X systems will
have a working nm --demangle, so this won't affect them.
$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.8.2
BuildVersion:
12C2034
$ c++filt --version
GNU c++filt 070207
20070207
Copyright 2005 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License. This program has absolutely no warranty.
$
$ go tool nm -n revcomp | grep quoteWith
4f560 T strconv.quoteWith
$ go tool nm -n revcomp | grep quoteWith | c++filt
f560 T strconv.quoteWith
$
$ nm -n revcomp | grep quoteWith
000000000004f560 t _strconv.quoteWith
$ nm -n revcomp | grep quoteWith | c++filt
000000000004f560 unsigned short _strconv.quoteWith
$
Fixes #4818.
R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/
7729043