Partially revert my recent kernelPackages changes

First, pass in `self' again so that overriding works properly (thanks
for pointing that out, @edolstra)

Second, instead of having linuxPackages*.kernel mean something different
inside the set and out, add a new attribute linuxPackages*.kernelDev,
which for the generic kernel is simply linuxPackages*.kernel but for the
manual-config kernel is the `dev' output (which has the build tree,
source tree, etc.)

The second change required trivial modifications in a bunch of
expressions, I verified that all of the linuxPackages* sets defined in
all-packages.nix have the same drv paths before and after the change.

Signed-off-by: Shea Levy <shea@shealevy.com>

pkgs/os-specific/linux/open-iscsi/default.nix

@@ -1,14 +1,14 @@
-{ stdenv, fetchurl, kernel}:
+{ stdenv, fetchurl, kernelDev}:
 
 stdenv.mkDerivation rec {
-  name = "open-iscsi-2.0-871-${kernel.version}";
+  name = "open-iscsi-2.0-871-${kernelDev.version}";
   
   src = fetchurl {
     url = "http://www.open-iscsi.org/bits/${name}.tar.gz";
     sha256 = "1jvx1agybaj4czhz41bz37as076spicsmlh5pjksvwl2mr38gsmw";
   };
   
-  KSRC = "${kernel}/lib/modules/*/build";
+  KSRC = "${kernelDev}/lib/modules/*/build";
   DESTDIR = "$(out)";
   
   preConfigure = ''