Fixed coverity in acl_hal_mmd.cpp: Resource leak (RESOURCE_LEAK)

mmd_libraries were not closed after execution, which causes memory leaks. But mmd_libraries cannot be closed trivially since closing the library invalidates the symbol return by dlsym(), which means calling the function further down is undefined behaviour.
To solve this issues, I added a `dl_wrapper_t` vector as a global initialized vector that would be deallocated when closing the runtime library. This vector would contain all the opened libraries that would be closed by the destructor of `dl_wrapper_t` once the vector deallocates.

Author: haoxian2