Add the missing MemoryTest driver to let memory above 4G be discovered in Shell memmap.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10356 6f19259b-4bc3-4df7-8a09-765794883524
diff --git a/DuetPkg/DuetPkg.fdf b/DuetPkg/DuetPkg.fdf
index 0323b6e..c6170e7 100644
--- a/DuetPkg/DuetPkg.fdf
+++ b/DuetPkg/DuetPkg.fdf
@@ -49,6 +49,7 @@
 

 INF  DuetPkg/FSVariable/FSVariable.inf

 INF  MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf

+INF  MdeModulePkg/Universal/MemoryTest/NullMemoryTestDxe/NullMemoryTestDxe.inf

 INF  MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf

 INF  MdeModulePkg/Universal/Console/ConPlatformDxe/ConPlatformDxe.inf

 INF  MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitterDxe.inf