Fix build break caused by adding DebugAgentLib to the DXE Core. 


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10122 6f19259b-4bc3-4df7-8a09-765794883524
diff --git a/BeagleBoardPkg/BeagleBoardPkg.dsc b/BeagleBoardPkg/BeagleBoardPkg.dsc
index afebb04..700df76 100644
--- a/BeagleBoardPkg/BeagleBoardPkg.dsc
+++ b/BeagleBoardPkg/BeagleBoardPkg.dsc
@@ -111,6 +111,7 @@
   
   GdbSerialLib|Omap35xxPkg/Library/GdbSerialLib/GdbSerialLib.inf
   ArmDisassemblerLib|ArmPkg/Library/ArmDisassemblerLib/ArmDisassemblerLib.inf
+  DebugAgentLib|MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.inf
 
 
 [LibraryClasses.common.SEC]