TELCODOCS-2344: cp binary in kmod image

Author: StephenJamesSmith

modules/kmm-creating-kmod-image.adoc

@@ -13,3 +13,5 @@ Keep the following in mind when working with the `.ko` files:
 
 * In most cases, `<prefix>` should be equal to `/opt`. This is the `Module` CRD's default value.
 * `kernel-version` must not be empty and must be equal to the kernel version the kernel modules were built for.
+
+In addition to the `.ko` files, the kmod image also requires the `cp` binary to be present because the `.ko` files are copied from this image to the image-loader worker pod created by the Operator. This is a minimal requirement and no other binary tool is required in the image.