Add a work around Dummy.c file to avoid autogen error to GCC tool chain family.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4963 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Foundation/Library/CompilerStub/CompilerStubLib.inf

@@ -24,6 +24,7 @@ BASE_NAME       = CompilerStub
 COMPONENT_TYPE  = LIBRARY
 
 [sources.common] 
+  Dummy.c
 
 [sources.ia32]
   Ia32/memcpyRep1.asm

EdkCompatibilityPkg/Foundation/Library/CompilerStub/Dummy.c

@@ -0,0 +1,21 @@
+/*++
+
+Copyright (c) 2008, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+Module Name:
+  memcpy.c
+
+Abstract:
+
+  This file is purely empty as a work around for CompilerStubLib to pass GCC build.
+ 
+--*/
+
+extern int __make_me_compile_correctly;