Add missing functions to the version script

kdump_read_string and kdump_xen_version were forgotten...

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Parse VMCOREINFO and store it in key-value pairs

Store a parsed version of VMCOREINFO for easier lookup later.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Add API calls for reading specific values from VMCOREINFO

This simply creates an interface to the pre-parsed VMCOREINFO.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>