Remove old initfini mechanism

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Sun, 19 Feb 2012 17:16:03 +0000 (UTC)

> Now that all libc targets are using the new crt*.S mechanism, I
> propose this patch to remove the old mechanism for generating those
> files.

Looks good to me.