pypa/virtualenv — pull request #516 by xen0n (2013-12-26 11:50:38+00:00)
Title: Properly support libdirs of explicit bitnesses

Formerly this is limited to lib64 on 64-bit systems; more configurations
such as Gentoo on MIPS N32 (which uses /usr/lib32; /usr/lib is for O32 ABI)
are supported now, please review.