Created by: hustliyilin

1. Add pal_get_local_report to both support remote attestation when enclave runtime started and rune attest command.
2. Use is_debug_mode to process the debug arg of Enclave Runtime.
3. rune/libenclave/skeleton: add skeleton_remote_attestation_with_rune.md.

Signed-off-by: Yilin Li YiLin.Li@linux.alibaba.com