ipsec-demo: Fix host contamination and build warning

ipsec-demo: Fix host contamination and build warning

All files in the test_setkey directory are being copied with
ownership preserved (cp -a).

* Change ownership of all files in test_setkey directory to
  root:root

Signed-off-by: Noor <noor_ahsan@mentor.com>
Signed-off-by: Abdur Rehman <abdur_rehman@mentor.com>
Signed-off-by: Sujith Haridasan <Sujith_Haridasan@mentor.com>
Signed-off-by: Zhenhua Luo <zhenhua.luo@nxp.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>