https://bugzilla.tianocore.org/show_bug.cgi?id=2505 Add an implementation of a sample unit test that demonstrates the use of the UnitTestLib services and macros and supports being built for execution in a host environment or for execution on a target in PEI, DXE, SMM, or UEFI Shell. Cc: Sean Brogan <sean.brogan@microsoft.com> Cc: Bret Barkelew <Bret.Barkelew@microsoft.com> Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Bret Barkelew <Bret.Barkelew@microsoft.com>