OvmfPkg: QemuBootOrder: collect active UEFI boot options in advance

OvmfPkg: QemuBootOrder: collect active UEFI boot options in advance

In preparation for the next patch, collect active UEFI boot options in
advance into a new array. Rebase the current inner loop (the matching
loop) to this array.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Chang <mchang@suse.com>
[jordan.l.justen@intel.com: initialize *ActiveOption for GCC IA32 warning]
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@14666 6f19259b-4bc3-4df7-8a09-765794883524