Add HostMemoryAllocationBelowAddressLib class and implementation that
uses OS specific services to perform pool and page allocations below
a specified address in a host based unit test application execution
environment. This library class is only required for mocking buffers
that are assumed to be below a specific address by code under test.
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Michael D Kinney