[OMPD] The LLVM OMPD library passes the memory read/write callback address argument by value

[jdelsign]

The LLVM OMPD library pass the memory read/write callback address argument by value, but it should be passing the argument as a pointer to the address.

The OMP v5.0 spec (and omp-tools.h header) define the read and write memory callbacks as:

    typedef ompd_rc_t (*ompd_callback_memory_read_fn_t)(
	ompd_address_space_context_t *address_space_context,
	ompd_thread_context_t *thread_context, const ompd_address_t *addr,
	ompd_size_t nbytes, void *buffer);

    typedef ompd_rc_t (*ompd_callback_memory_write_fn_t)(
        ompd_address_space_context_t *address_space_context,
        ompd_thread_context_t *thread_context, const ompd_address_t *addr,
        ompd_size_t nbytes, const void *buffer);

However, the LLVM OMPD library passes the "addr" argument by-value. For example, see:
https://github.com/OpenMPToolsInterface/LLVM-openmp/blob/ompd-devices/libompd/src/ompd.h#L200