Bug#360491: "uname -m" broken in ia32 chroot

[Robert Millan <rmh@aybabtu.com>]

Package: libc6
Version: 2.3.6-3
Severity: important

When running an i386-linux-gnu chroot on an x86_64-linux-gnu host:

$ uname -m
x86_64

This seriously breaks lots of native autoconf checks.  A massive number of
packages will FTBFS or work improperly when built inside the chroot.

I think uname() should have hardcoded (#ifdef __x86_64__) machine name instead
of asking Linux which doesn't always know.

-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-1-amd64-k8
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)

-- no debconf information