autoPatchelfHook: Provide a better derivation name

Thanks to @Ericson2314 for the suggestion to provide a name for the hook
script. Comment was posted here:

https://github.com/NixOS/nixpkgs/pull/34506#discussion_r167421856



Very useful if you use some other hooks and autoPatchelfHook so you
don't just get a bunch of "hook" derivations.

Tested by quickly building (not running) teamviewer and masterpdfeditor.

Signed-off-by: aszlig <aszlig@nix.build>
Reported-by: John Ericson <Ericson2314@yahoo.com>