syscall: Return full error details.
syscall: Return full error details.

Don't discard the original error object as it contains essential
information for problem determination.

Signed-off-by: James O. D. Hunt <348fbaadfbada55ea105602bf5609e23ac1c4898@intel.com>

wcwxyz/virtcontainers,wcwxyz/virtcontainers,containers/virtcontainers,wcwxyz/virtcontainers,containers/virtcontainers