2. Removed the generation of ASM_PFX macro in AutoGen.h
3. Changed gCallerIdGuid to the type of GUID in AutoGen.c
4. Added "extern gCallerIdGuid" and EFI_CALLER_ID_GUIDin AutoGen.h
5. Changed output directory of EFI file to DEBUG_DIR
6. Added "if exist"/"test -e" before creating/removing directory command