base.install: Add kexec tools and kernel debug packages

Add the kexec support for Debian and RedHat like distributions.
With kexec mechanism, we can use the kdump program to get a crashdump if the system panic.

Packages added:
  - kdump-tools (Debian)
  - linux-image-XXX-dbg (Debian)
  - kexec-tools (RHEL)
  - kernel-debuginfo (RHEL)
  - linux-crashdump (Ubuntu)