SourceLevelDebugPkg DxeDebugAgent: Handle additional initialize cases.

Handle both DEBUG_AGENT_INIT_REINITIALIZE and
DEBUG_AGENT_INIT_DXE_CORE_LATE InitFlags to prevent an assert.

No additional initlization takes place for these cases.

Signed-off-by: Aaron Pop <aaronpop@microsoft.com>

SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c

@@ -2,6 +2,7 @@
   Debug Agent library implementation for Dxe Core and Dxr modules.
 
   Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) Microsoft Corporation.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -537,6 +538,11 @@ InitializeDebugAgent (
 
       break;
 
+    case DEBUG_AGENT_INIT_REINITIALIZE:
+    case DEBUG_AGENT_INIT_DXE_CORE_LATE:
+
+      break;
+
     default:
       //
       // Only DEBUG_AGENT_INIT_PREMEM_SEC and DEBUG_AGENT_INIT_POSTMEM_SEC are allowed for this