security: Extend TPM label APIs

security: Extend TPM label APIs

The virSecurityDomainSetTPMLabels() and
virSecurityDomainRestoreTPMLabels() APIs set/restore label on two
files/directories:

  1) the TPM state (tpm->data.emulator.storagepath), and
  2) the TPM log file (tpm->data.emulator.logfile).

Soon there will be a need to set the label on the log file but
not on the state. Therefore, extend these APIs for a boolean flag
that when set does both, but when unset does only 2).

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>