This fixes an issue where corrupt-linux would use the kernel config from the
wrong version. The reason is that the package phases in customize-linux come
from inheriting the package in the 'linux' keyword argument, defaulting to
linux-libre. The kernel configuration comes in the configure phase. Since we
did not use this in the customize-linux in corrupt-linux, we would be using
the wrong configuration. For example, linux-6.7 would be built with the
linux-libre-6.6 kernel config rather than linux-libre-6.7, missing the new
CONFIG_BCACHEFS_FS option. Presumably all of our kernels were trying to use
the default linux-libre version kernel config rather than the correct one to
match their version. This should fix that.
* nongnu/packages/linux.scm (corrupt-linux): Use the 'linux' keyword argument
in customize-linux.
Reported-by: reedm and yelninei on the #nonguix IRC channel.