EmulatorPkg: Merge build*.sh into build.sh

Merged OvmfPkg/build.sh changes to allow a single build script
for IA32 & X64 builds.

Signed-off-by: jljusten

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11927 6f19259b-4bc3-4df7-8a09-765794883524
4 files changed