python-blivet: Patch in paths for mount and lsof.

This adds the correct store paths for mount, umount and lsof to blivet as these
commands are still generic enough to _not_ add them as a dependency.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

pkgs/top-level/python-packages.nix

@@ -471,6 +471,8 @@ pythonPackages = python.modules // rec {
         s|wipefs|${pkgs.utillinux}/sbin/wipefs|
         s/-f/--force/
       }' blivet/formats/__init__.py
+      sed -i -e 's|"lsof"|"${pkgs.lsof}/bin/lsof"|' blivet/formats/fs.py
+      sed -i -r -e 's|"(u?mount)"|"${pkgs.utillinux}/bin/\1"|' blivet/util.py
     '';
 
     propagatedBuildInputs = let