The official psw installer from Intel doesn't create a symbol link libsgx_launch.so to libsgx_launch.so.1, leading to pal init failure.

Signed-off-by: Shirong Hao<shirong@linux.alibaba.com>

Due to the design of runelet, the Enclave Runtime PAL is loaded
in host but launched in container. The fact that certain libraries
from Intel SGX PSW would use dlopen() to further load libsgx_launch.so,
which means the container has to have it. In  order to ensure all
libraries dependent by Enclave Runtime PAL are completely loaded in
host, preload them prior to switch into container.
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com>