1. build.py's changes : include XXXEntryPointLib.h into the corresponding autogen...

1. build.py's changes : include XXXEntryPointLib.h into the corresponding autogen.c files of various modules to avoid the inconsistence between the interface definition of library class and the implementation of autogen.c
2. code base changes : modify some interface definitions to follow the lastest Mde Library Spec.
3. PeiCore changes : remove the return value of PeiCore() which is meaningless as PeiCore will never reach the end of procedure.replace it with VOID.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6271 6f19259b-4bc3-4df7-8a09-765794883524