EmulatorPkg: Fix GCC49 build hang in PeiCore

EmulatorPkg: Fix GCC49 build hang in PeiCore

This is a port of 55e96f9c601781b8dc52c40747922f6ca3521f9e / r17902 to
EmulatorPkg:

commit 55e96f9c601781b8dc52c40747922f6ca3521f9e
Author: Ruiyu Ni <ruiyu.ni@intel.com>
Date:   Thu Jul 9 08:55:23 2015 +0000

    OvmfPkg: Fix GCC49 build hang in PeiCore

Cc: Andrew Fish <afish@apple.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Fixes: https://github.com/tianocore/edk2/issues/24
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19099 6f19259b-4bc3-4df7-8a09-765794883524