Why not /usr/bin64?

[Neal Becker <ndbecker2 gmail com>]

On multi-arch, e.g. x86_64, we have /usr/lib for 32bit and /usr/lib64 for
64bit.  We should have a place for 32bit and 64bit bins.  To be consistent,
64bit would go in /usr/bin64.  This would cause massive problems for all
the apps that expect to look in /usr/bin.  Here are 2 proposals:

1) 32bit in /usr/bin32, 64bit in /usr/bin64, and /usr/bin->/usr/bin64
2) 32bit in /usrbin32, 64bit in /usr/bin