pull module blacklist from Ubuntu and use it by default

People often have serious problems due to bogus modules like *fb.

pkgs/os-specific/linux/kmod-blacklist-ubuntu/default.nix

@@ -0,0 +1,28 @@
+{ stdenv, fetchbzr }:
+
+stdenv.mkDerivation rec {
+  name = "blacklist-ubuntu-${builtins.toString src.revision}"; # Saucy
+
+  src = fetchbzr {
+    url = meta.homepage;
+    sha256 = "0ci4b5dxzirc27zvgpr3s0pa78gjmfjwprmvyplxhwxb765la9v9";
+    revision = 13;
+  };
+
+  unpackPhase = "true";
+
+  installPhase = ''
+    mkdir "$out"
+    for f in "$src"/debian/modprobe.d/*.conf; do
+      echo "''\n''\n## file: "`basename "$f"`"''\n''\n" >> "$out"/modprobe.conf
+      cat "$f" >> "$out"/modprobe.conf
+    done
+  '';
+
+  #TODO: iwlwifi.conf has some strange references
+
+  meta = {
+    homepage = https://code.launchpad.net/~ubuntu-branches/ubuntu/saucy/kmod/saucy;
+    description = "Linux kernel module blacklists from Ubuntu";
+  };
+}