Instead of using a mishmash of statically linked and dietlibc
programs (which often have problems on various platforms), we just
use normal, dynamically linked binaries, and use some patchelf magic
to rewrite them so that they can find Glibc. Also include G++ and
Perl, since there are some builds in the bootstrap that need them.
svn path=/nixpkgs/branches/stdenv-updates/; revision=13788
