This commit removes all references to emacs24 with the exception of
emacs24-macports. The two folders in `pkgs/applications/editors` named
`emacs-24` and `emacs-24` are consolidated to a new `emacs` folder.
Various parts in nixpkgs also referenced `emacs24Packages` (pinned to
`emacs24`) explicitly where `emacsPackages` (non-pinned) is more
appropriate. These references get fixed by this commit too.
the new $NIX_GCC/nix-support/dynamic-linker file to locate the
dynamic linker directly (don't hardcode ld-linux.so.2).
svn path=/nixpkgs/trunk/; revision=6873