Sync patch r13667 from main trunk.
Set correct DS/ES/FS/GS/SS segment selectors after GDT loaded.

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1/UefiCpuPkg@14635 6f19259b-4bc3-4df7-8a09-765794883524