If passing to gcc4.5 the compile flag: "-fplugin=dragonegg.so" it will use the llvm optimizers and
code generators.
In that previous commit I enabled link time optimization and plugin support in gcc 4.5.0
svn path=/nixpkgs/trunk/; revision=22235
builders. These are redundant now.
* Inlined some trivial builders.
* Removed a few explicit setup-hook creations. This is done
automatically now if setupHook is set.
* Deleted the initscripts package. NixOS doesn't use it anymore.
svn path=/nixpkgs/branches/stdenv-updates/; revision=15276
