[arch-dev-public] Toolchain changes

[Lukas Jirkovsky]

> 1) /lib and /lib64 symlinks have been moved from glibc to the filesystem
> package. Also a /usr/lib64 symlink has been added (see below).

I hate to say that, but I'm actually glad that there's now a /usr/lib64 symlink.

Even though I prefer /usr/lib over /usr/lib64 on pure 64bit system
(why be so redundant),it will help at least one application – I
already have to create such symlink for one of my AUR packages.

Lukas