tools lib traceevent: update KVM plugin
tools lib traceevent: update KVM plugin

The format of the role word has changed through the years and the
plugin was never updated; some VMX exit reasons were missing too.

Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs